This is the original replacement watch strap for the Seiko SDX018 & SDX020 Quartz Chronograph

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

SDX018, SDX020

SDX018J1, SDX018J9, SDX020J1, SDX020J9

This watch strap is suitable for the following case numbers:

7T42-7A2A, 7T42-7A20, 7T42 7A2A, 7T42 7A2O

Product specifications:

Brand: Seiko

Article number: ZPJ87G

Model number (s): SDX018, SDX020

Material of the watchband: leather

Color(s) of the watchband: brown, beige (stitching)

Width at fitting (Lug width): 18 mm

Width at the widest part of the watchstrap: 18 mm

Width of the strap at clasp-side: 17 mm

Strap length of the short part (measured without clasp): 75 mm

Strap length of the long part: 115 mm

Shape of the wristband at fitting is: Straight

Watchband type: Stitched strap

Type of clasp: Buckle

Material of the clasp: stainless steel

Color of the clasp: gold-plated

Seiko clasp-reference: -

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

Seiko case-pin reference: S180BS - (See related products)

Print / version: calf leather

Other references: SEIKO CALF JAPAN-Z 18