Does anyone know what the difference is between the two brakes shown below? I think the Gran-Compe (Lower Photo) version is their model GC-610 or at least that's what is shown on Velobase. The other is probably the original DC-610 model (Upper Photo). They look the same except for the sticker. Both indicate "Drop Forged" and also have the 5583 stamped on the back side. Sorry I don't have the Gran-Compe in hand to view side-by-side at the moment.
Naturally Dia-Compe has newer versions using the same 610 model number just to confuse things more. Wonder why they'd do that??
Inquiring minds want to know
Thanks,
Don