Caseback gasket for Seiko 6309,6306,6105,7002,7S26 SKX779 SKX781 Watches (x1) 1 gaskets supplied factory fit for any of the above Seiko Great quality ... check the feedback i have received Great price... A very simple and cost effective upgrade for your seiko diver Please look at all photos and ask any questions Last photo shows perfect fit on my 6309-7040 ( Turtle ) If you are unsure… let me know what Seiko you have ! These are for *** Large Seiko divers *** 7s26-0020, SKX007, 009 6309,6306,6105,7002,7S26 SKX779 SKX781 Watches (x1) I normally post same day as payment received !