The aforementioned Cannondale had the same 105 group on it, with the same levers, and I bought that one new in 1987.
So if the component group is not contemporary, judging by the badge the frame is 77 (unless that was changed).
I'm wondering if the 8 on the BB means anything as well, and if the design/style of the lugs is a clue.
The assumption here is that the bike is a Paramount. I don't think that it is, and would like to know what it could be.
The Letour's had serial numbers on the rear dropouts, this has no other numbers on it.
I'm still wondering what I have.....