Rare 1987 Vintage CASIO W-780 (549) Japan H Stainless Steel 35mm Wristwatch,CASIO】W-780 ヴィンテージ 完動品 80´s 電池交換済み - e-life-sp.co.jp,CASIO】W-780 ヴィンテージ 完動品 80´s 電池交換済み - e-life-sp.co.jp,Sold) Casio W-780. A rare old classic diver. It is one of the first diver watch of Casio, when other watches were 30m resistant in the 80's, this one had 100m resistance.