Unusual Bow Pedals

[ohdeebee]

Anybody know anything about these bow pedals with red inserts?

 

[GTs58]

All I can say is that style is 1966. I don't think I've seen them with a red metal insert behind the cutouts before. Some crafty kid dressing up his pedals? Or would Union do this for a specific bike manufacturer?

 

[neighbor]

Not sure about yours but these are on my 1949 Swiss Titan