I made a trade my art deco pocket watch (Omega with 38.5 LT1 movement) for this vintage chrono. Lebois & Cie is the sign on the dial. Not shure if this is the one from a french chronograph maker Raymond Dondane which owned a brand Lebois & Co:
It looks to be one, looking at few similar on the net.
He usualy used Landeron 39, Valjoux 22, Venus 188 and similar large size movements. But I cant recognize this one.
Otherwise it is a large 39mm (WO crown) stainless stell housing chrono, movement is 34-35 mm in diameter, so some 14,75-15``` measured on the back side. Movement is not signed on the back. I guess it should be somewhere between 1936-1942.
Watch came winded a little. All chrono functions do work properly. Crystal has some inner cracks (replacement is an option). Dial is in wery decent condition. Movement needs cleaning (and ofcourse servicing) and case needs some polish.
Can someone please help me on that movement ID. Some old Venus (Valjoux), looking at the bridges, could be a candidate, but I can`t find one that looks like this one. Any other info is moore than welcome.