Plastic Crystal with yellow tension ring, fits many Sekio cases which take 31.0 mm crystal. Replaces 310T10ANS, 310T14ANSĬrystal to Fit Seiko 310T18ANG Yellow Tension Ring Plastic Crystal with white tension ring, fits many Sekio cases which take 31.0 mm crystal. Simply remove old tension ring from your old crystal with your fingernail and insert inside this PA472-78 crystal to fit Seiko 340T06AN. This crystal like the original is a tension ring crystal. If you want to change you crystal to sapphire, it is not possible if the original crystal is a domed plastic crystal.Īnd the original crystal is a round mineral glass either flat or low dome, remove the old crystal, measure diameter and thickness, then go to the Sapphire Crystal page linked to the main watch crystal page.įits case numbers H556-5040, H556-5049, H556-504AĬystal 305W24GN fits case numbers H558-5010 If crystal needed for your case number is not listed on the page, then call the Watch Crystal Department at 510 832-0355, office hours 8:30 to 12:30 then 1:30 to 5 Monday thru Friday. We do not offer a stock check service via email for Seiko Crystals or other watch parts for that matter. Orders for Seiko crystals not shown on the should be faxed or called in with your regular watch part orders. If we do not have in stock your customers crystal we can order it from Seiko if they still offer the crystal. Our stock on hand is almost 10,000 different Seiko Crystals.