A GENTLEMAN'S 9CT SOLID GOLD VERTEX PURSE WATCH / WRISTWATCH CONVERSION CIRCA 1930s D: Silver dial with quarterly applied Arabic numerals, gilt surround, Breguet style hands. M: 17 jewel manual wind movement signed Vertex Supreme. C: Rectangular case with later added wire lugs, sliding protective cover with guilloche pattern, signed Vertex London Made, matching numbers in both parts, hallmarked, case measures approx. 35mm by 24mm. S: Black leather strap.