topaz
Established
While looking around the net trying to find the vintage of my Synchro Compur shutter, I stumbled upon a site by Hans Kerensky, called "the worlds best photos of compur and shutter". A tremendous archive of compur "how to". The shutter I bought to disassemble runs perfectly, and the mainspring looks modern My Rolleiflex 3.5E spring is more flat steel, while this one is typical round spring steel. May just keep this for parts or whole as needed.