John Smatlak posted:Flyer Hiawatha clockwork streamliner, 1936-38. The Greenberg Flyer Prewar O gauge guide notes that there were two variations on the loco- 635 and 637, the difference being the size of the clockwork mechanism. This has me curious- does anyone know how to distinguish the difference?
the Flyer small motor key is usually on the left side. post a picture of the underside... it's very easy to tell.