Help me identify my classic frame

It looks like a well made steel frame that probably has good quality butted tubing and seems to be quite racy with a fairly tight geometry. Looking at the Campagnolo dropouts doesn't tell us much as they were in a long production over decades. The sloping fork crown and the recessed brake nuts date this to being an 80s or even early 90s race frame. The seat stay/seat tube interface is pretty standard and the lugs look like unmodified generic parts from some lug makers catalogue so the frame could have been made by any number of framebuilders that used to churn them out either under their own name or rebranded for a shop to sell (like Dave Russell in Slough as the first example that comes to mind). The fact it has very little lettering or numbering means it could have been a custom job, or the other numbers could be lost. Whatever the real answer, it's a good quality frame and should be a great ride.