Originally Posted by
Rick_D
Had a brief "hey, mine doesn't have those" but then I rediscovered them on the fork crown. Two ceremonial whams, awarded.
Windows in fork crowns were (still are) often cast-in rather than made by subtraction, like punching or drilling and filing. Though if the ones you're talking about are on the inner tangs, those were often made from stamped steet metal even if the rest of the crown was investment-cast.
Cast-in windows, Roto and Bocama respectively
:
Punched inner tangs:
