Full-size patent model (U.S. Patent No. 77,702) of a two-pot, vegetable steamer or cooker, made by Heinrich A. Zopff of Milwaukee, WI, and patented on May 5, 1868. The upper pot is double-walled with a perforated liner and covered conical bottom for catching the steam, while the lower pot has a copper pit bottom. Both are wire-rimmed with two, horizontal, arched strap handles and vertical folded seams. Concave cover has an arched strap handle, folded edge, and soft-soldered lapped-seam flange. Brass oval metal tag on upper pot is engraved in script "H.A. Zopff / Milwaukee / Wisconsin". Two darkened paper tags tied to one handle with red or purple (faded) wove ribbon and white string are printed and handwritten with the patent information.
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