Frederique Constant Watch Slimline Ladies FC-220MPWD1S23B. The Slimline collection is a series of ultra-thin models, comprising quartz as well as automatic and high-end in-house movements. Elegance of the shape, timelessness of the style, harmony of the curves, everything contributes to make each of these timepieces a classic in a modern interpretation. Thin and chic at each and every level.