This is the original replacement watch strap for the Seiko 8523 0180 - STW131 SQ

This watch band / bracelet is suitable for the following model numbers:

STW131, STW133, STW135

STW131J1, STW133B, STW133J1, STW135B, STW135J1

This watch strap is suitable for the following case numbers:

8523-0180, 8523-018K, 8523-018B, 8523-018L, 8523-018C, 8523 O18O, 8523 O18K, 8523 O18B, 8523 O18L, 8523 O18C

Product specifications:

Brand: Seiko

Article number: Z5003S

Model number (s): STW131, STW133, STW135

Material of the watchband: stainless steel

Color(s) of the watchband: grey,

Width at fitting (Lug width): 13 mm

Width at the widest part of the watchstrap: 13 mm

Width of the strap at clasp-side: 10 mm

Total strap length: 150 mm

End-pieces (end-links): Included

End-piece-reference: Z5003S EP

Extension-link reference: Z5003S LK

Watchband type: Linked-bracelet

Type of clasp: Fold-over-clasp

Material of the clasp: stainless steel

Color of the clasp: grey

Seiko clasp-reference: G5177J BK

Type of case-pins: Springbar - (NOT included)

Seiko case-pin reference: S130BS - (See related products)

Print / version: matted

Other references: Z 5003