86311344 Color Gray Material Stainless Steel Outer Diameter 41 mm Inner Diameter 37 mm
This is the original dial for the Seiko Sumo Prospex SBDC031J
86016599 Color Red & Blue Outer Diameter 42
4GC9NB Color Black Lug width 19 mm Width clasp-side 17 mm Length of each part 88 mm Material Rubber / Sillicon
SEIKO 2ND GEN MONSTER CROWN WITH STEM SRP307 SRP309 SRP311 SRP313 4R36 01J0 6R15 Seiko Dials 86311344 Color Gray Material StainlessThis is the original crown with stem for the Seiko 2nd Generation Monster SRP307 SRP309 SRP313 SRP581 SRP657 SBDC023 SBDC025 Related case numbers: 4R36 01J0, 4R36 O1JO, 4R36 03Y0, 6R15 02X0, 4R36 O3YO, 6R15 O2XO Seiko models: SRP307J1, SRP307J2, SRP307K1, SRP307P9, SRP309J1, SRP309J2, SRP309K1, SRP313J1, SRP313K1, SRP313K2, SRP581K1, SRP581J1, SRP581P9, SRP657K1, SBDC023, SBDC025 Product Specifications Brand Seiko Part ref. 1E70AJSNS1 Color Gray