I would like to say that the bikes should be presented by era, that is:
Klunkers - the first mountain bikes, whether fairly original or modified
Steel lugged/fillet brazed frame bikes - no suspension, geared, 26" or 650B wheels
Steel welded frame bikes - no suspension, geared, mostly 26" wheels...
It is a 3-speed (see the pulley on the top tube), but the brakes, levers, shifter, cables, and such are gone. I would bet the the 3-speed hub still functions, or will after some cleaning. The hub was licensed from Sturmey Archer most likely.
Saw this on Delaware CL. I don't know if it is 1950's, but it looks pretty clean and the price seems decent. It is not my type of bike, but I thought I would post it.
Ladies Hawthorn bike that appears to be in very good condition. Located in Rehoboth Beach, DE. BTW - this is not my bike and I do not know the seller.