Seiji K. also known as Seiji Lepine is a watch collector and historian most well known for the discovery of the earliest serial numbered Longines watch "183" that was manufactured on October 23, 1867, the year Longines opened its factory

at St. Imier Switzerland.


https://www.swatchgroup.com/en/services/archive/2018/collector-finds-oldest-longines-watch-known-date



https://imgur.com/1fLqKpa https://imgur.com/VUT3Bmn https://imgur.com/qSZQHS2

He has appeared in several news articles. https://imgur.com/DKtTbto https://imgur.com/F8w4av6

He was in a 2019 film on the discovery and authentication of serial number 183. https://imgur.com/PsnZSHp https://imgur.com/6dQmqC6 https://imgur.com/5wq2Lou https://imgur.com/NDbwhwC

https://mediacenter.longines.com/a-collector-finds-the-oldest-longines-watch-known-to-date-a-historical-discovery-for-the-brand/

Several of his watches have been included in Longines and Military watch reference books including in John Goldberger's "Longines Legendary Watches" https://imgur.com/IiXbSAf https://imgur.com/HFTJ9Bu https://imgur.com/b8XNB1P https://imgur.com/cLsrJF5 https://imgur.com/MohUK8p https://imgur.com/KQXLX3x https://imgur.com/inhFBeU https://imgur.com/5UUi7kt https://imgur.com/WU7wDpr


Zaf Basha Military Watch Book Contributions https://imgur.com/nR9jTVu https://imgur.com/8Kdpig5 https://imgur.com/pXlAHkq https://imgur.com/IRqOfSq https://imgur.com/iOjU2zB https://imgur.com/WHtuyBa


WatchTime Magazine https://imgur.com/R7dQ9jb https://imgur.com/Xug77ox https://imgur.com/Wo8NUHy https://imgur.com/UMIoJGJ https://imgur.com/B6incGX https://imgur.com/62wrYzt https://imgur.com/NNUD1qg



Longines Instagram https://imgur.com/eW5oPOz https://imgur.com/JGH2jmo https://imgur.com/U26XWqo Collectors Meeting 2019