Hi Omegoids, I bought a Lemania 105 about 18 months ago. It worked for 5 minutes and then stopped. I put it away marked for a later service and this weekend it came alive in my hands...so I decided to wear it for a couple of days. I decided to look into the Lemania brand a little more as I have a couple and am very fond of them. I found a lot of confusing data concerning the 105 cal 1275 Chronos. As far as I know 105's housed 1270 1275,1276 and 1277 . There seem to be 2 subdial and 3 subdial options, button and coffin pushers (the former replacing the latter sometiime 50-55) some just marked 105, othersmarked incabloc in red, and others marked Antichoc all seemingly mixed up in the post war period 48-1955. Case measurements run from 33-38mm too. Does anyone know more? Here are two of mine. I'm guessing the 105 Chrono is early to mid 50's, the tank ref. 9104pa ad is from 1956 and the watch bought 1959