Selling my Vostok Amphibia Blue Scuba Dude, the watch has few micro scratches on the case, some on the bezel and crystal typical of normal usage if there are any. I usually keep this watch is super shape. The watch is functional, winds and keeps good time. The problem I have is that for some reason it does not seem to hold a full wind or last a full day if wound alone and stops intermittently. If the watch is worn constantly it will last forever due to the automatic winding by the rotor. The watch will only be supplied with the NATO shown on the first pictures and no other strap. The watch has been slightly modified with a red seconds hand and bezel + insert when I purchased it. It will be shipped in the original box. Because of the winding issue I am selling the watch "for parts". :( I am asking $55 USD net to me via Venmo or PayPal (buyer pays the fees + shipping) , shipping only to the United States using USPS. Vostok Amphibian 710059 (Scuba Dude) • Case Size : 41mm X 45mm X 15mm • Band Width : 22mm • Stainless steel case • Crystal : organic spherical glass/ acrylic • Movement : 2416B (Date) 31J, Automatic with Manual winding, no hack, Power reserve no less than 31 hours • Depth Rating: 200M/20 ATM • Accuracy : -20 +60 sec/day Below is what I found when digging for information on what I experience. According to the web search results, the Vostok 2416b movement is a self- winding mechanism that can also be manually wound 25-30 revolutions. However, some sources suggest that the mainspring barrel of this movement has a design that allows the spring to slip once a certain amount of tension is achieved, which prevents over- winding. Others claim that the movement may have been fitted with the wrong mainspring that does not have this feature, and that manual winding may cause damage to the movement. Therefore, it is advisable to use the minimal number of turns per day (TPD) when winding the movement by hand, and to stop when the resistance increases Alternatively, wearing the watch every day can keep it wound by the rotor.