細節
A Fortin-type marine barometer Mk 2
by Negretti & Zambra, with comparison scale marked Mk. IVA and correction dates to 66 -- 35¾in. (91cm.) long, 20th century, in wood case
by Negretti & Zambra, with comparison scale marked Mk. IVA and correction dates to 66 -- 35¾in. (91cm.) long, 20th century, in wood case