This is a vintage-style women's gold-tone wristwatch featuring a round black face and a textured black leather strap.
Several luxury and vintage brands offer very similar designs, particularly from the 1980s and 90s. Potential matches include:
Diamond Quartz: A common vintage brand that features a single diamond or jewel accent at the 12 o'clock position on a black dial.
Revue Thommen: The "Wall Street" style has a similar gold-plated case and black face.
Peugeot: Offers the "Elise" model, a 14K gold-plated 27mm watch with a sleek black leather band.