BCM = bocama lugs. That really doesn't help at all; neither does the parts mix. The headset and bottom bracket are the last to be replaced, usually, so if these are Campagnolo, the bike may very well have been originally equipped with campy stuff. pretty gentle, non-racing geometry (judging from the long rear stays). I'd guess English, from the semi-wrap seat stays. I couldn't get closer without some pretty solid evidence, though.