White gold Watch no. Unknown

Case: White gold, heptagonal, numbered 304616. Dial: Silvered, applied Breguet numerals Movement: Provenance: 19?? - Haas Neveux, Geneve ???? - Prince Mohammed Tewfik A. Toussoun of Egypt 2021 - Sotheby's, est $1-1,500, "Property from the Estate of Prince Mohammed Tewfik A. Toussoun of Egypt, Haas Neveux & Co., Genève & Paris A white gold heptagonal open faced watch, Circa 1910 Dial: silvered, guilloché center field, Breguet numerals Caliber: mechanical, 19 jewels Movement number: 90'00Z Case: 18k white gold, snap on case back Case number: 304'616 Size: 41 mm diameter Signed: case, dial and movement"