CD 728.7: USA

2 3/4" X 3 7/8" (70mm X 99mm)

 

(Around thread base)

OAKMAN'S PATENT JULY 26, 1870

 

Photograph courtesy Bob Berry

This style can also be found unmarked with a standard pinhole. The version shown matches the Samuel Oakman July 26, 1870 Patent date for the locking pin.


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