Joined: Feb 2012
Posts: 19,344
Likes: 5,462
From: Rochester, NY
Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Mongoose Tomac ATB, GT Bravado ATB, JCP Folder, Stewart 650B ATB
The best chance is the serial number. But who to ask, where to search, for a serial number not yet assigned to a brand? "BCM" is the initials for Bocoma, a manufacturer of lugs and BB shells used by dozens of bike brands. I suspect this frame is from the 1970s to early 1980s. Andy
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AndrewRStewart