Oil Lamp Filler Adapter in a # 1 collar size.
Marked " Pat'd # 497,075". (patent issued on May 9,1893)
Slide out type.
Number 1 size threaded filler has a 7/8 inch diameter.
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Original Antique Americana, Clocks, Period Lighting, Patriotic, U.S. Militaria, and Original Photos.