Seiko SRP637 Extension Link 4R36-03Z0 Baby Tuna Watch Crystals Reference table:

Reference table:

This is the original rotating bezel for the Seiko GMT Calendar Perpetual SLT019 Lucky Dip

This is the original dial for the Seiko 7A34 Chronograph

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Width at the widest part of the watchstrap: 18 mm

Seiko SRP637 Extension Link 4R36-03Z0 Baby Tuna Watch Crystals Reference table:Here you can buy the extension link for the Seiko SRP637K1 & SRP637J1 Prospex Baby Tuna Steel Related case numbers: 4R36 03Z0, 4R36 O3ZO, 4R36 04T0, 4R36 00V0, 4R36 02A0 Related models: SRP637J1, SRP637K1, SRP637P9, SRP637P1, SRP637 Reference table: (if the part isn't available here; click the Reference link or check the related products) Part Reference Strap R002031J0 Bracelet M0JT211J0 Dial 4R3603S4XB13 Hour Hand 1FX075FFBEW Minute Hand 2FB125FCBEW