FOR PARTS/REPAIR – Prior to the replacement crown recently unscrewing the movement had been running strong and keeping accurate time over an approximate 40 hour power reserve period. When I recently went to use the semi-quickset date function to scroll through nearly an entire month the crown unscrewed. It can be screwed back down and the time can be forward set but when the crown is turned counterclockwise (hands moved backwards) it unscrews. And when winding the crown it sounds like crunching lettuce. Rather than winding the crown to generate a power reserve if the watch is gently spun face down on a soft, flat surface the movement fires up immediately. The more it’s spun the longer it will run. Given that the crown unscrews and doesn’t wind as it should and considering the movement’s unknown service history a complete overhaul is needed. This vintage 1970’s Zodiac Sea Wolf has an originally black SWISS T. While I normally show pictures of the movements of watches I put up for sale I don’t feel comfortable removing the case back on this watch. The case back on Sea Wolf’s are notoriously difficult to remove and should be done by a skilled watchmaker familiar with how to do so in order to avoid causing damage. Until recently the movement had been running strong and keeping accurate time over an approximate 40 power reserve period. However, when I recently went to use the semi-quickset date function to scroll through nearly an entire month the replacement crown unscrewed. This watch measures approximately 35 mm excluding the crown, approximately 37 mm including the replacement crown and approximately 17.75 mm between the lugs. Case thickness, measured from the bottom of the case back to the top of the bezel is approximately 8 mm. Including the crystal case thickness measures approximately 11 mm. Given the issues with the crown and considering the movement’s unknown service history a complete overhaul is needed. 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.