I managed to get an Orange E3 frame, a pair of RC35 Monobox MXCD, circa 1995-1996 forks and an old USE purple seat post and shim for £110 and decided that it would be a good rebuild project.
I wanted to know the head tube size for a headset and stem (I haven't decided whether it's to be a quill or ahead). The length of the steerer tube suggests a ahead setup. The steerer tube is 1 inch.
I couldn't find out anything on the Orange site.
I measured the head tube and it appears to be 37mm externally and 30mm internally. This seems too large for a 1 inch headset, or am I miscalculating something?