拍品 73
73
A 19th Century mahogany framed galvanometer, unsigned, on three adjustable feet - 15in (38cm) high; a lacquered brass thermopile signed Elliott Bros 30 Strand London; and another signed Griffin London (3)

細節
A 19th Century mahogany framed galvanometer, unsigned, on three adjustable feet - 15in (38cm) high; a lacquered brass thermopile signed Elliott Bros 30 Strand London; and another signed Griffin London (3)