Rare, original miniature tintype of a patent model of Knowles' steam pump, taken circa 1863. Listing image #2 is a drawing of the pump found online.. it's provided here for reference only and the image is not included. This listing is for the original tintype only.

Gem-sized tintype is only about 3/4" of an inch tall by 1" wide. It's in very good antique condition.

Priority Mail.