Closure: fine early lugged zinc cap marked on top TRADE MARK THE MASON DISK PROTECTOR CAP PATd NOV 30 1880 and with the original pickle-pusher immerser insert marked PATENTED NOV 30 1880
Appearance: shiny glass
Condition: roughness and flaking of the ground mouth
Age: late 1800's
Availability: scarce and a sharp example
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