| Serial | Model(s) | Registration (1) | Registration (2) | Operator(s)/Name |
|---|---|---|---|---|
| 10 | CA-5 mod | NC2915 | - | Miss Doran (Dole racer) |
| 11 | CA-5 | NC3915 | NC885 | unk. |
| 12 | unk. | unk. | - | unk. |
| 13 | unk. | unk. | - | unk. |
| 14 | CA-5 | NC3701 | NC1496 | Trump Airways/Minneapolis |
| 15 | CA-5A | NC1451 | - | Mamer Flying Service/Washington |
| 16 | CA-3A | NC1420 | - | unk. |
| 17 | CA-3A | NC1551 | - | L.T.Royal/Detroit |
| 18 | CA-3A | NC1450 | - | N.B. Mamer/Washington |
| 19 | CA-5 | NC1771 | - | Buhl Aircraft Co/Michigan |
| 20 | CA-5 | NC1732 | - | unk. |
| 21 | unk. | unk. | - | unk. |
| 22 | CA-5A | NC3762 | - | unk. |
| 23 | CA-5 | NC4356 | G-CATO | Buhl Aircraft Co > National Air Transport/Canada |
| 24 | CA-5A | NC5311 | - | unk. |
| 25 | CA-5A | NC5464 | - | unk. flown in Robert H. Martin in 1929 |
| 26 | CA-3B | NC6810 | - | unk. |
| 27 | CA-3 | NC5861 | - | unk. |
| 28 | CA-3C | NC5860 | - | unk. |
| 29 | CA-3C | NC6816 | - | unk. |
| 30 | CA-3C | NC6874 | - | unk. |
| 31 | CA-3C | NC6873 | - | unk. |
| 32 | CA-3C | NC6872 | G-CATP | Buhl Aircraft Co > National Air Transport/Canada |
| 33 | CA-3C | NC7101 | - | unk. flown by Frederick Porter in 1928 and Stanley Shoemaker in 1930 |
| 34 | CA-8 | NC7570 | - | unk. flown by Dick Ranaldi in 1929 |
| 35 | CA-3C->-3D | NC7448 | - | Loren Mendell Angelino Jr (Oakland-Cleveland race) |
| 36 | CA-5A | NC7452 | - | unk. |
| 37 | CA-3C | NC7623 | - | unk. |
| 38 | CA-5A | NC7624 | - | unk. |
| 39 | CA-8 | NC7705 | - | unk. |
| 40 | CA-8A | NC9626 | - | unk. flown by Louis B. Meister in 1929 |
| 41 | CA-6 | NC9627 | CF-AAY | Cherry Red Airline Ltd/Canada |
| 42 | CA-6 Special | NC9628 | - | Spokane Sun God (distance record) |
| 43 | CA-6->-6J? | NC9629 | - | Bankline Oil Company > Los Angeles Aircraft Ltd > INS > |
| 43-A | CA-8A | NC12895 | - | unk. |
| 44 | CA-6 | CF-ACX | - | National Air Transport/Canada |
| 45 | CA-6->-3D | NC9631 | - | unk. (CA-3D per Juptner) |
| 46 | CA-3D Special | NC9630 | - | unk. |
| 47 | CA-6 | NC9632 | CF-AOZ | Brooks Construction/Brooks Airways/Canada |
| 48 | CA-6>-6W | NC9633 | - | unk. |
| 49 | CA-3D->-6D Special | NC9635 | - | unk. |
| 50 | CA-6 | NC9634 | XB-AAT | Lineas Aereas del Balsas/Mexico |
| 51 | unk. | unk. | - | unk. |
| 52 | CA-6 | NC8446 | - | unk. |
| 53 | CA-3D Special | NC8447 | - | unk. |
| 54 | CA-6B | NC8449 | - | Central Airlines |
| 55 | CA-6 | NC8450 | - | unk. |
| 56 | CA-6->-6J | NC8453 | CF-AQG | Brooks Construction/Brooks Airways/Canada |
| 57 | CA-3D<->-3E | NC8451 | LV-NVE | Packard Diesel > Aeroposta Argentina |
| 58 | CA-6 | NC8452 | XA-BIL | Servicio Aéreo Panini/Mexico > (possibly) Lineas Aereas del Balsas/Mexico |
| 60 | CA-6 | NC8448 | XA-BIA | Servicio Aéreo Panini/Mexico > (possibly) Lineas Aereas del Balsas/Mexico |
| 61 | CA-6B | NC8455 | - | Mamer Air Transport/Spokane |
| 62 | CA-6B | NC8456 | - | Mamer Air Transport/Spokane |
| 63 | CA-6B | NC8457 | - | Mamer Air Transport/Spokane |
| 78 | CA-6 | - | XA-BAV | Servicio Aéreo Panini/Mexico > Lineas Aereas del Balsas/Mexico |
| 202 | CA-6A | NC12829 | - | ? > Great Lakes Airlines (briefly), Last aircraft built by Buhl, had round wingtips. |
| S-400 | CA-8A->-8B | NC14501 | - | unk. |
| S-420 | CA-6 | NC14502 | - | unk. |
| OPAS 1 | CA-6M | CF-OAQ | - | Ontario Provincial Air Service/Canada |
| OPAS 2 | CA-6M | CF-OAR | - | Ontario Provincial Air Service/Canada > L Fletcher |
| OPAS 3 | CA-6M | CF-OAS | - | Ontario Provincial Air Service/Canada > A Mann > M Richards |
| OPAS 4 | CA-6M | CF-OAT | - | Ontario Provincial Air Service/Canada |
| unk. | CA-5A | unk. | NC3034 | unk. |
| 21? | CA-5A mod | unk. | NC3763 | Standard Air Lines > The Angeleno (endurance record) flown by Pete Reinhart in 1930 |
| unk. | CA-3-> -3C | NC2441 | - | M.L Linton & Co. Insurance/ |
| unk. | CA-3A | unk. | NC3 | Poss. duplicate of above. |
| unk. | CA-3A->-3C->-3CW | unk. | NC4 | Poss. duplicate of above. |
| unk. | CA-6 | unk. | XA-BFV | Servicio Aéreo Panini/Mexico |
