FOR PARTS/REPAIR – The movement sometimes runs, sometimes doesn’t. A complete overhaul is required. This seldom seen women’s vintage 1970’s Chronosport 20 ATM diver has a pristine blue “Swiss Made” signed dial and the original lume, which remains fully intact and emits a quick burst glow after being exposed to bright light, has aged to a perfectly matching buttermilk hue. The blue bezel, which shows wear and ratchets counterclockwise, presents nicely. The all stainless steel case shows honest wear with minor signs of oxidation. The outer edge of the case back is stamped “20 ATMOS WATERRESISTANT SHOCKRESISTANT STAINLESS STEEL SWISS MADE” with “1707” stamped in the center. The crystal needs to be replaced. While I normally show the movements of watches I put up for sale the case back on this one is torqued too tight for me to remove. While the date and time can be manually set and the quickset date function works as it should the movement does not always run. Additionally, when winding the screwdown crown it skips with the stem not regularly engaging the movement. The quickset date function works flawlessly by pulling the crown out to the first position and then turning it clockwise until the desired date has been reached. Given the issues mentioned and considering the movement’s unknown service history a complete overhaul is required. This watch measures approximately 28 mm excluding the crown, approximately 31 mm including the crown and approximately 14 mm between the lugs. Case thickness, measured from the bottom of the case back to the top of the bezel, is approximately 10 mm. Including the crystal case thickness measures approximately 11 mm. As such there are no warranties, express or implied, attached with the sale of this watch. Vintage means old and while my personal belief is that old-school means better quality and workmanship, things can and do go wrong from time to time. For this watch that time is now. Any servicing costs going forward are your responsibility. And please study the 12 high magnification pictures carefully as they are part of the description and serve as an accurate representation of the condition of this watch.