An original, US military issue Stocker & Yale Sandy 490 manual wind Swiss-made watch.The official nomenclature for this item is the General Purpose Wrist Watch. It was adopted by the US Army right before Operation Desert Shield/Storm in 1990. This Swiss watch has an ETA 2801 manual wind movement that allows precise time setting. Tritium vials are placed at five minute intervals around the watch face, as well as on the hour and minute hands of the watch.Demand for these watches was ...so high that Stocker & Yale was was unable to meet it, and subsequently another manufacturer took up the slack. This makes these originals highly collectible.Excellent unworn condition. See photos for best description. Thanks for looking!