> The Round Ball clip with "Sheaffer's" on it was not seen on 
> striped USA-made Balances, which sport the smooth Radius clip 
> on all lines save the Junior which has a flat-ball clip with 
> "Sheaffer's" on it.

Not quite accurate. There were two lines that did not bear the radius
clip. The Junior line's flat-ball clip has "Sheaffer Jr." on it, and the
step-up line's striped-era US models (Craftsman, etc.) also have the
flat-ball clip, and it is imprinted "Sheaffer'S" (non-standard trim
models excepted).

--Daniel