Watch no. Unknown

Case: Probably platinum, engraved & enamelled with "Greek key" design. Dial: Silvered, arabic numerals, blued steel hands, apertures for day, date & month, unsigned. Movement: Nickel, bi-metallic balance with [probably flat] blued steel balance spring, probably stamped with Geneva seal. Identical calibres: 20433, 20453, 20457, 20458 Provenance: 19?? - Haas Neveux, Geneva 19?? - Haas Neveux advert