1930s 9ct gold vintage Birch & Gaydon watch

A two-colour 9ct gold rectangular vintage Birch & Gaydon watch. The case measures 27 x 33mm (including lugs). The case is hallmarked to the back and numbered. The Swiss made movement has 15 jewels. The silvered guilloche (engine-turned) dial has black Arabic numerals with a subsidiary seconds dial and blued steel hands. The dial is signed Birch & Gaydon, Fenchurch street, London above the centre.