18ct Gold slim dress style Pocket Watch, with movement by Patek Philippe & Co for Black, Starr & Frost, Gorham. Number 809036. 45 mm slim case marked 18K to back cover and inner dust cover, both with matched numbers to movement, c.1930s. Champagne dial with gold raised Arabic numerals, minute indices, signed 'Black Star & Frost, Gotham' and Patek Philippe & Co above a subsidiary seconds dial at 6. Near mint condition, beautifully finished 18 jewel movement. adjusted to eight positions, lever escapement. Signed Patek Philippe & Co., Geneva, Switzerland' and numbered 809036. 50gm