ST-4077: USA

Diameter 3" (76mm)

 

(cap embossed) US PAT 3,024,303 "OB logo"

 

Picture courtesy Mid Norris

Diameter 3" (76mm)

 

(cap embossed) US PAT 3,024,303 "OB logo"

 

Picture courtesy Mid Norris

Original ST number assignment by Raven Kotlarsky and Steve Coffman


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