Serial no. is: Y7B1386

The frame is a lugged, decently light steel road frame that I have. It was repainted prior to my acquisition of it, so I do not know the maker of it.
The bike originally had 105 components on it, so I it think is a pretty decent frame.

Sadly there are no distinct frame characteristics- the lugs are pretty plain, and there are no identifying marks on the seatstay caps.

I assume the last two digits of the serial code correspond to the year of the frame- ca. 1986 , as the original 105 components are of that vintage.
Also the frame has somewhat strange geometry- 56cm top tube, 52 cm seat tube.