Seiko Turtle on X: "The Classic GL831 Rubber Diver Strap-- 20mm and 22mm-is back and better than the original. It is the perfect original companion for your #SEIKO 6309 or SRP777 from #
Hands-On Review Uncle Seiko Vintage Straps - BEYOND THE DIAL
skx007j] Got the curved uncle seiko rubber strap, much better than the OE strap and shorter. Used the OE buckle to give it the period correct look. This might do for now