Great drawing of the General Watch Co (Helvetia) "Floating movement"! Here is a pic of the movement in one of my watches showing the underside of the spring loaded screws and the notches in the rim for fitting it. More info (patent drawing etc.) here https://www.helvetiahistory.co.uk/1930s-sports-watches Here are some of my favourite ads: This one with the watch Haven't quite got the match for this one. New arrival, pre-repair, nearly a match but about 5 years later. It would be great if I could get a scan of that G & M Lane leaflet to add to the site? Thanks. Carl
Vintage = plus 20 ~ 25 years... so I'll post the controversial ad showing astronaut M. Gernhardt during STS-69 in September 1995 .