A 19th-Century diamond balance,

細節
A 19th-Century diamond balance,
by De Grave, Short & Co., the steel beam with brass pans and weights, in mahogany case -- 5½in. (14cm.) wide; and a steel balance with brass pans and some weights, in japanned case -- 6½in. (16.5cm.) wide

See Illustration (trade label)
(2)