WWI-period officer's Rolex wrist watch

Rare WWI-period officer's Rolex manual wind wristwatch, number 722709. With a solid 9 carat gold case and white porcelain dial with Roman numerals, its movement and case bear full Rolex marks and it has a nicely matching 'Apollo' make leather strap. Fully restored and works like a charm. The case is hallmarked London import 1916 and overall condition with signs of wear throughout. It weighs 20.1 grams and its case diameter is 28 mm / 1.1 inches. measures 19 mm / ¾ of an inch diameter.