細節
An American bronze dental mould,
with iron guides, inscribed on the cover NO 22C Tench Donham B.D.M. Co., Buffalo. N.Y., the underside engraved Made In U.S.A., Pat. Feb. 10.1920. -- 4¼in. (10.8cm.) wide
with iron guides, inscribed on the cover NO 22C Tench Donham B.D.M. Co., Buffalo. N.Y., the underside engraved Made In U.S.A., Pat. Feb. 10.1920. -- 4¼in. (10.8cm.) wide