This tantalising scrap of paper has all the romance of a fragment of an early New Testament scroll discovered behind the crumbled wall of a medieval monastery. Where is Indiana Jones when you need him most?
Superficial archaeological analysis indicates that this was a three speed system with a freewheel made up of 16, 18 and 20 toothed cogs.
Browse associated derailleurs.
Ihaga S.A.G. 1939?