1920s early silver round vintage Omega watch

An early silver round vintage Omega watch. The case measures 33mm in diameter, with a screw front bezel revealing the movement which hinges out. The case is signed Dennison Watch Case Co., hallmarked Birmingham 1929 and numbered 583880. The movement, with a protective dust cover, is signed Omega Watch Co. Swiss, with 15 jewels, adjusted to two positions and numbered 7656848. The white enamel dial has black Roman numerals with a subsidiary seconds dial. The dial is signed Omega above the centre.