1920s round silver vintage Longines watch

An early silver round vintage Longines watch. The silver case measures 30 mm in diameter. The case is signed AB (Arthur Baume, director of Longines U.K.), hallmarked London 1925 and numbered. The Swiss manual wind movement, with a hinged protective dust cover, is signed Longines, B&Co. with 15 jewels. The white enamel dial has fine black Roman numerals with a red twelve, subsidiary seconds dial and fine gilt hands. The dial is signed Longines above the centre.