Gents Vintage CASIO W-780 Digital Watch - 100m,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.,1987 Casio W-780 Digital - FOR PARTS OR REPAIR | WatchCharts Marketplace,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.