Seiko · Prospex Land

Strap for Prospex Land SRPA71K1 Stainless Steel / Black / Bracelet

Takes 21 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width21 mm
Case diameter42 mm
ReferenceSRPA71K1
FamilyProspex Land
MovementSeiko caliber 4R35 hours, minutes, seconds | date
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Prospex Land SRPA71K1

Selected for the 21 mm lug width · workshop selection

All 21 mm straps →

The Prospex Land SRPA71K1, seen from the bench

The Prospex Land SRPA71K1 is equipped with the Seiko 4R35 automatic caliber, offering hour, minute, second and date indication. The watch has 21mm lug width for the strap. The 4R35 movement provides a power reserve of approximately 41 hours.

Frequently asked questions

What is the lug width of the Seiko Prospex Land SRPA71K1?

The SRPA71K1 features a 21-millimetre lug width, measured between the anchor pins. This specification is model-specific and must be verified precisely using a digital calliper before ordering a replacement strap.

What is the best strap for the Seiko Prospex Land SRPA71K1?

The ideal strap depends on intended use: for an elegant pairing, crocodile leather in dark brown with a steel buckle; for extreme functionality, vegetable-tanned calf or a cotton-sateen NATO. Your choice must reflect the balance between aesthetics and the watch's mission.

How do I change the strap on the Seiko Prospex Land SRPA71K1?

Remove the spring bars (small metal springs) using a dedicated tool: insert the flat tip beneath the spring, gently pull downward, and slide out the strap. Reinsert the spring bars into the new strap, aligning the holes and verifying the lock mechanism.

Is the SRPA71K1 compatible with quality aftermarket straps?

Yes, provided the strap is engineered for a 21mm lug width. Always verify technical specifications and select manufacturers who test mechanical compatibility and water-resistance performance.

How long does a leather strap last on the Seiko Prospex Land SRPA71K1?

A quality leather strap (crocodile or vegetable-tanned calf) typically lasts 18–36 months under regular use with proper maintenance: monthly cleaning, drying after humidity exposure, and storage away from direct heat sources.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only