Men's Slimline WatchThe Slimline Collection is a series of ultra flat models. The fine quartz movements upon which this elegant series of watches is based have a thickness of just 1. 90 mm. These timepieces include latest technology, while maintaining their same successful, stylish and clean designs. The Frederique Constant Slimline: a tribute to fine Geneva Watchmaking, uniting style, elegance and high quality at sensible prices. With a date aperture,diameter of 38.