The logo is Baume & Mercier, no doubt about that. Year, collection? Doesn't work this way for vintage B&M, and frankly, I doubt that the serial number will be of any help. We can sure try to identify the movement, and its production years will give you an idea of when your watch was made. However, we would need a picture of the movement to identify it.
Judging by the design of the watch- and design alone- I would say 1970s, 1980s. Watches with integrated gold bracelets were popular back then, and many major brands had them- from Certina and Eterna up to brands like Vacheron & Constantin. I'd call this design a sort of an avant-garde dress watch.
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