This is a vintage 1970s Longines Ultra-Chron chronometer measuring 35mm in stainless steel with screw-back, original winding crown, original dial, and hands. This watch is in spectacular overall condition. The two-tone reflective dial is amazing to gaze upon! I love the offset date. This watch is sleek and slim. The fine automatic chronometer-grade movement was just cleaned and is accurate. These Longines watches are vastly overlooked and undervalued.