Vintage Wittnauer Men's Quartz Diamond Dial Tank Watch

This is a vintage Wittnauer quartz wristwatch featuring a classic rectangular 'tank' style case with a gold-tone finish. The dial is characterized by a vertical linear texture (pinstripe guilloche pattern) and a single small round-cut diamond or high-clarity crystal set at the 12 o'clock position. The dial features the 'WITTNAUER' brand name and the 'Quartz' designation in cursive script. It is equipped with simple baton hour markers and slim gold-tone hands. The case shows significant signs of wear, including multiple surface scratches, pitting in the gold plating, and visible dirt or oxidation along the bezel edges. The crystal appears heavily scratched and potentially cracked, particularly across the upper left quadrant. The watch is fitted with an aftermarket or period-correct gold-tone expansion band featuring a textured brick-link design, which also shows accumulation of debris between the links. Based on the quartz movement and typography, this piece likely dates to the 1980s or 1990s. The overall condition is fair to poor, requiring professional cleaning and crystal replacement.