vintage frame with “Marathon Racer” head badge, serial 53101
Hi — trying to identify this vintage bicycle. The head badge reads “Marathon Racer” and the frame serial is 53101. I couldn’t find a match in public registries or completed listings. Photos attached: full profile, head badge close-up, serial close-up, bottom bracket area, rear dropouts, and components.
Any ideas about maker, approximate production year or where this head badge was used? Thanks in advance — any pointers appreciated!
by Some-Paper-4854