I was gifted a bike today which I gladly and immediately used for parts.
There were no markings on the bike, but the frame said "made in Japan" and most of the parts were from Japan too. The lugged frame seems pretty heavy for a road bike, but the components are pretty good - certainly useable.
Anyway, there aren't any marks on it anywhere to identify the maker. Attached is a sketch of the headbadge design which only further fuels the mystery. Any ideas what make of bike this is?