The "snow" is really snow. I pick up the bike from the backyard of the house. In Cleveland area it was light snowing in the last days.
On the rear hub is a triangle and under it is a "5" or "S".
I don't know if the rest of my bikes are interesting for you guys, they are not very old.
Older bikes: Indian 3 speed with rear dynohub late'50s, Columbia 3 speed with front dynohub '57, JC Higgins 3 speed 50's, all men bikes, with Sturmey Archer rear hub.