To sort out:
Don Bucefalo: https://gallica.bnf.fr/ark:/12148/btv1b8437359q/f1.item.r=Th%C3%A9%C3%A2tre-Italien https://gallica.bnf.fr/ark:/12148/btv1b8437360c.r=Th%C3%A9%C3%A2tre-Italien?rk=1824043;2
Simon Boccanegra https://gallica.bnf.fr/ark:/12148/btv1b53117971z/f1.item.r=Th%C3%A9%C3%A2tre-Italien.zoom
Esmeralda: https://gallica.bnf.fr/ark:/12148/btv1b70009304/f1.item.r=Esmeralda%20opera.zoom
Falstaff: https://gallica.bnf.fr/ark:/12148/btv1b531873083/f1.item.r=Hohenstein.zoom and/or https://gallica.bnf.fr/ark:/12148/btv1b531590273/f1.item.r=Hohenstein.zoom
Le roi de Lahore (1877) https://gallica.bnf.fr/ark:/12148/btv1b531791095.r=Le%20roi%20de%20lahore?rk=536483;2
https://gallica.bnf.fr/ark:/12148/btv1b70012442/f1.item.r=Massenet%20opera.zoom
https://gallica.bnf.fr/ark:/12148/btv1b7001245g.r=Massenet%20opera?rk=2145933;2
Manon (1884) https://gallica.bnf.fr/ark:/12148/btv1b53187292r.r=affiche%20manon?rk=42918;4
https://gallica.bnf.fr/ark:/12148/btv1b8438388r.r=Manon%20opera?rk=21459;2
Le Cid (1885) https://gallica.bnf.fr/ark:/12148/btv1b531790982/f1.item.r=Massenet%20opera.zoom https://gallica.bnf.fr/ark:/12148/btv1b70000976.r=Massenet%20opera?rk=1781124;4 https://gallica.bnf.fr/ark:/12148/btv1b531790982.r=Le%20cid%20massenet?rk=42918;4 - High priority
Esclarmonde (1889) https://gallica.bnf.fr/ark:/12148/btv1b53187300h/f1.item.r=Massenet%20opera.zoom
Charles Cambon: : [1] [2], [3] full-colour images, e.g. [4], [5]
Best:
https://gallica.bnf.fr/ark:/12148/btv1b53117713m/f1.item.r=opera%20affiche
- Otello https://gallica.bnf.fr/ark:/12148/btv1b53117049w/f1.item.r=opera%20affiche
- Lohengrin https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39834974m%22&rk=1437775;2
- Norma https://gallica.bnf.fr/ark:/12148/btv1b531169722/f1.item.r=Bellini%20Norma
Les Huguenots https://gallica.bnf.fr/ark:/12148/btv1b8438000c/f1.item.r=Meyerbeer
Weirdest:
Auber (sure I missed some with him)
- Jenny Bell https://gallica.bnf.fr/ark:/12148/btv1b531790300/f1.item.r=opera%20affiche
- Marco Spada https://gallica.bnf.fr/ark:/12148/btv1b531790357.r=opera%20affiche?rk=4206029;2
- Zerline https://gallica.bnf.fr/ark:/12148/btv1b53179122v.r=opera%20affiche?rk=5064402;4
Audran
- La mascotte https://gallica.bnf.fr/ark:/12148/btv1b53145697k.r=opera%20affiche?rk=1309019;2 https://gallica.bnf.fr/ark:/12148/btv1b53185359x.r=opera%20affiche?rk=4334785;2
Bellini
Instead, do https://gallica.bnf.fr/ark:/12148/btv1b531169722/f1.item.r=Bellini%20Norma.zoom and https://gallica.bnf.fr/ark:/12148/btv1b53116971m/f1.item.r=Bellini%20Norma.zoom
Berlioz
- La Damnation de Faust https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000821490/v0001.simple.selectedTab=record
- Les Troyens https://gallica.bnf.fr/ark:/12148/btv1b53187305r.r=berlioz%20affiche?rk=64378;0
Bizet
- La Jolie fille de Perth https://gallica.bnf.fr/ark:/12148/btv1b53179181w.r=opera%20affiche?rk=8691030;0
- Les Pêcheurs de Perles https://gallica.bnf.fr/ark:/12148/btv1b531791919.r=opera%20affiche?rk=2660957;2
Bruneu
Chabrier, E
- L'Etoile https://gallica.bnf.fr/ark:/12148/btv1b53145623w.r=opera%20affiche?rk=3540790;0
- Gwendoline (mediocre scan) https://gallica.bnf.fr/ark:/12148/btv1b9007694m/f1.item.r=opera%20affiche.zoom
- Le Roy malgré lui (sure I missed one for this) https://gallica.bnf.fr/ark:/12148/btv1b531678731/f1.item.r=opera%20affiche
Charpentier
- Louise https://gallica.bnf.fr/ark:/12148/btv1b53187312t.r=opera%20affiche?rk=1416316;0 https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0002140980
David, F. (think I missed some of his)
Debussy
Pelléas et Mélisande https://gallica.bnf.fr/ark:/12148/btv1b53187316m/f1.item.r=opera%20affiche
Delibes
- Jean di Nivelle https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb404565679%22&rk=4120192;0
- Lakme https://gallica.bnf.fr/ark:/12148/btv1b53187290v.r=opera%20affiche?rk=2811172;4
- Sylvia https://gallica.bnf.fr/ark:/12148/btv1b53179110j.r=opera%20affiche?rk=11008638;0
Dupont
Erlanger
Fevrier
Flotow
Gounod
- Cinq-Mars https://gallica.bnf.fr/ark:/12148/btv1b531872792.r=opera%20affiche?rk=3261818;4
- Faust https://gallica.bnf.fr/ark:/12148/btv1b53179095q/f1.item.r=opera%20affiche https://gallica.bnf.fr/ark:/12148/btv1b531791953.r=opera%20affiche?rk=3626627;2 https://gallica.bnf.fr/ark:/12148/btv1b53179112f.r=opera%20affiche?rk=5042943;2
- Polycete https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb420302347%22&rk=1673828;0
- Romeo et Juliette https://gallica.bnf.fr/ark:/12148/btv1b531791847.r=opera%20affiche?rk=3090144;0
- Le tribut de Zamora https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb402910525%22&rk=4699594;0
Lalo
- Le Roi d'Ys https://gallica.bnf.fr/ark:/12148/btv1b9008911p.r=opera%20affiche?rk=13733973;2 https://gallica.bnf.fr/ark:/12148/btv1b53187299w.r=opera%20affiche?rk=21459;2
Lecocq (TONS more)
Litolff
Massenet
- Cendrillon https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39837301g%22&rk=4656675;2
- Manon https://gallica.bnf.fr/ark:/12148/btv1b53187292r.r=opera%20affiche?rk=3927058;0
- Marie-Magdalene https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb42297108p%22&rk=4055814;0
- Le Vierge https://gallica.bnf.fr/ark:/12148/btv1b53179106t.r=opera%20affiche?rk=3133062;4
- Le Roi de Lahore https://gallica.bnf.fr/ark:/12148/btv1b531791095.r=opera%20affiche?rk=2317608;0
- Panurge https://gallica.bnf.fr/ark:/12148/btv1b53167735w/f1.item.r=opera%20affiche
Massé
Messager
- La Béarnaise https://gallica.bnf.fr/ark:/12148/btv1b53145703f.r=opera%20affiche?rk=4377704;0
- Les deux pigeons https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39836231w%22&rk=2832632;0
- Isoline https://gallica.bnf.fr/ark:/12148/btv1b531874071.r=opera%20affiche?rk=21459;2
- Madame Chrysanthème https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000817350
Meyerbeer
- L'africane https://gallica.bnf.fr/ark:/12148/btv1b531791167.r=opera%20affiche?rk=4270407;2
- Les Huguenots https://gallica.bnf.fr/ark:/12148/btv1b8438000c/f1.item.r=Meyerbeer
Offenbach (incomplete)
- Bagatelle https://gallica.bnf.fr/ark:/12148/btv1b531456195.r=opera%20affiche?rk=1201722;4
- Barbe-Bleu https://gallica.bnf.fr/ark:/12148/btv1b53187440j.r=opera%20affiche?rk=21459;2
- La boulangère a des écus. https://gallica.bnf.fr/ark:/12148/btv1b53187447p/f1.item.r=opera%20affiche
- Les braconniers https://gallica.bnf.fr/ark:/12148/btv1b53187445s.r=opera%20affiche?rk=7918494;0
- Les Brigands https://gallica.bnf.fr/ark:/12148/btv1b9004132v.r=opera%20affiche?rk=4914187;2
- Chateau a Toto https://gallica.bnf.fr/ark:/12148/btv1b53187334j.r=opera%20affiche?rk=21459;2
- Les contes d'Hoffmann https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb422981694%22&rk=3175981;2
- La Créole https://gallica.bnf.fr/ark:/12148/btv1b53145622f.r=opera%20affiche?rk=1630909;2
- Diva https://gallica.bnf.fr/ark:/12148/btv1b9004131f.r=opera%20affiche?rk=5171699;2
- Le Docteur Ox https://gallica.bnf.fr/ark:/12148/btv1b53192952b/f1.item.r=opera%20affiche
- La Foire Saint-Laurent https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39839729f%22&rk=4549378;4
- Genevieve de Brabant https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39836217b%22&rk=1587990;4
- La Grande duchesse de Gerolstein https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb398362160%22&rk=6802608;4
- Madame Favart https://gallica.bnf.fr/ark:/12148/btv1b53167793g.r=opera%20affiche?rk=7875575;2
- Madame l'Archiduc https://gallica.bnf.fr/ark:/12148/btv1b53145620j.r=opera%20affiche?rk=11695336;4
- Maitre Petronilla https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb40295750c%22&rk=4721053;2
- Orphée aux enfers https://gallica.bnf.fr/ark:/12148/btv1b53167755q.r=opera%20affiche?rk=12939978;0 https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb42145359f%22&rk=13648136;0
- La perichole https://gallica.bnf.fr/ark:/12148/btv1b53187442f.r=opera%20affiche?rk=150215;2
- Le Pont des Soupirs https://gallica.bnf.fr/ark:/12148/btv1b53145738x.r=opera%20affiche?rk=2575120;0
- Le Princesse de Trebizonde https://gallica.bnf.fr/ark:/12148/btv1b53145748b.r=opera%20affiche?rk=21459;2
- Robinson Crusoe https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb40295113h%22&rk=2789713;2
- Le roi Carotte https://gallica.bnf.fr/ark:/12148/btv1b53167759h.r=opera%20affiche?rk=5300455;2
- La Vie Parisienne https://gallica.bnf.fr/ark:/12148/btv1b53118316s.r=opera%20affiche?rk=10751126;0
https://gallica.bnf.fr/ark:/12148/btv1b531873350.r=opera%20affiche?rk=21459;2
- Le Voyage dans la Lune https://gallica.bnf.fr/ark:/12148/btv1b531677565.r=opera%20affiche?rk=21459;2
https://gallica.bnf.fr/ark:/12148/btv1b53167757m.r=opera%20affiche?rk=5815479;2
Perry
- La croix de l'Alcade https://gallica.bnf.fr/ark:/12148/btv1b531678123.r=opera%20affiche?rk=1459234;4
Pessard
Planquette
- Les Cloches de Corneville https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000823291 https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb402847262%22&rk=5407752;0 https://gallica.bnf.fr/ark:/12148/btv1b90142045.r=opera%20affiche?rk=5536508;0
- Les Voltigeurs (etc) https://gallica.bnf.fr/ark:/12148/btv1b53187400w/f1.item.r=opera%20affiche
Puccini
- La Boheme (ITALIAN) https://gallica.bnf.fr/ark:/12148/btv1b9008145q/f1.item.r=opera%20affiche
- Edgar (incomplete) https://gallica.bnf.fr/ark:/12148/btv1b90081160/f1.item.r=opera%20affiche https://gallica.bnf.fr/ark:/12148/btv1b90080580.r=opera%20affiche?rk=2446364;0
Reyer (lots more available)
- Salammbo https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000831256
- Sigurd https://gallica.bnf.fr/ark:/12148/btv1b90031685.r=opera%20affiche?rk=5236077;2
Saint-Saëns
- Ascanio https://gallica.bnf.fr/ark:/12148/btv1b531790948.r=opera%20affiche?rk=1695287;2 https://gallica.bnf.fr/ark:/12148/btv1b53179093t.r=opera%20affiche?rk=1759665;2
- Henry VIII https://gallica.bnf.fr/ark:/12148/btv1b53179101k.r=opera%20affiche?rk=1802584;0
- Phryné https://gallica.bnf.fr/ark:/12148/btv1b53187307n.r=opera%20affiche?rk=2103014;4
- Samson et Dalila https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000836778
Salvayre
Semet (& Georges Sand)
Strauss, J.
- La Reine Indigo https://gallica.bnf.fr/ark:/12148/btv1b53187389v.r=opera%20affiche?rk=4742512;4
- La Tzigane https://gallica.bnf.fr/ark:/12148/btv1b531873941.r=opera%20affiche?rk=1845502;4
Strauss, R.
de Suppe
Thomas
- Francoise de Rimini https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb40486409g%22&rk=1909880;4
- Hamlet https://gallica.bnf.fr/ark:/12148/btv1b53179113w.r=opera%20affiche?rk=21459;2
- Mignon https://gallica.bnf.fr/ark:/12148/btv1b53179015d.r=opera%20affiche?rk=2768254;0
- Raymond https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39840666d%22&rk=515024;0
Vasseur
- Le Mariage au tambour https://gallica.bnf.fr/ark:/12148/btv1b531678731/f1.item.r=opera%20affiche
Verdi
- Don Carlos https://gallica.bnf.fr/ark:/12148/btv1b53179114b.r=opera%20affiche?rk=11867011;2
- Falstaff https://gallica.bnf.fr/ark:/12148/btv1b531873083/f1.item.r=opera%20affiche
- Il Trovatore https://gallica.bnf.fr/ark:/12148/btv1b531181807.r=opera%20affiche?rk=14184619;2
- Macbeth * https://gallica.bnf.fr/ark:/12148/btv1b53179187k.r=opera%20affiche?rk=7660982;0
- Un Bal masqué https://gallica.bnf.fr/ark:/12148/btv1b531791792/f2.item.r=opera%20affiche
- Rigoletto https://gallica.bnf.fr/ark:/12148/btv1b531177125/f1.item.r=opera%20affiche.zoom https://gallica.bnf.fr/ark:/12148/btv1b53117713m/f1.item.r=opera%20affiche
- Otello https://gallica.bnf.fr/ark:/12148/btv1b53117049w/f1.item.r=opera%20affiche
Wagner
https://gallica.bnf.fr/ark:/12148/btv1b53179090g/f1.item.r=opera%20affiche
- Les Maitres Chanteurs de Nureburg https://gallica.bnf.fr/ark:/12148/btv1b53179077s.r=opera%20affiche?rk=11137394;0
- Tannhauser https://bibliotheques-specialisees.paris.fr/ark:/73873/pf0000836779 https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22opera%20affiche%22%29%20and%20dc.relation%20all%20%22cb39840538w%22&rk=2017177;2
Wormser