I don't have instruments of measurement right now. But I do have two other rear wheels. Tried them both and they fit on my Windor. One of these wheels is the original that came with it and the other is my friend's real nice fixie. So I'm pretty sure my frame is up to par with modern track bikes.

It has to be the OLD and not the dropouts. Maybe it's just a badly built wheelset? It kind of looks like the actual hub is smaller. Weird