This appears to be a vintage Baume & Mercier Classima MV045088 wristwatch.
Brand/Model: Baume & Mercier Classima (Reference MV045088)
Case: 32mm solid 18K yellow gold case with a slim profile
Dial: Glossy white dial featuring gold-tone Roman numerals at the 12, 3, 6, and 9 positions with raised triangular hour markers
Movement: Swiss quartz movement
Strap: Leather strap is original black strap and tang buckle