3 straps
Straps by lug width
Measure between the lugs, where the strap goes in. Then pick your number.
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Rollball II Watch Band for Seiko Prospex Speedtimer SSC813 SSC815 SSC817, Stainless SteelBrushed, V Diver Clasp
20 mm Steel€109.90 -
Super-O Boyer 20mm Stainless Steel Bracelet for Seiko SSC813 SSC815 SSC81720 mm Steel€122.90 -
Super-O Boyer Watch Band for Seiko Prospex Speedtimer SSC813 SSC815 SSC817, Stainless SteelBrushed, V Diver Clasp
20 mm Steel€101.90