Originally Posted by
JohnDThompson
The rear dropouts look like Shimano UF, which suggests that the fork may be a replacement. Gipiemme did make a similar dropout, but yours appear to be different.
Your bike:
Shimano UF:
Gipiemme "semi-vertical:"
Note that the raised dropout face extends down to the derailleur hanger on both your bike and the Shimano dropouts, but they are clearly separate on the Gipiemme dropout.
Perhaps it is a Japanese (or American custom) frame with a Basso fork?
Those dropouts out are real close, but it does look like the "holes" in the frame dropouts might be a bit smaller than either the Shimano or Gipemme dropouts. I don't know if that is a difference that matters, and it may just be paint filling the holes.