Seiko · 5 Sports

Strap for 5 Sports Suits Style Stainless Steel / Green / Mesh

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
ReferenceSRPD75K1 (aka: SRPD75)
Family5 Sports
MovementSeiko caliber 4R36 hours, minutes, seconds | date, day
Year2019
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 5 Sports SRPD75K1 (aka: SRPD75)

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The 5 Sports SRPD75K1 (aka: SRPD75), seen from the bench

The Seiko 5 Sports SRPD75K1 is powered by the automatic caliber 4R36 with hour, minute, second, date and day of the week indication. The watch features 22mm lugs for the strap. It is part of the Seiko 5 Sports collection dedicated to affordable automatic sports watches.

Frequently asked questions

What is the exact lug width of the Seiko 5 Sports SRPD75K1?

The Seiko 5 Sports SRPD75K1 is fitted with 22-millimetre lugs. This measurement is taken from the junction point of the lug with the case to the inner extremity. It is a standard width for instruments of this calibre, compatible with leather, NATO, rubber, and fabric straps.

Which strap pairs best with the Seiko 5 Sports SRPD75K1?

A vegetable-tanned leather strap amplifies the tool watch identity: honey or cognac tones enhance the satin-finished steels of the case. For those preferring practicality, a 1.2 mm NATO canvas in military hues (khaki, grey, black) offers reliability without maintenance. FKM rubber remains the choice for serious diving and aquatic sports.

How do you change the strap on the Seiko 5 Sports SRPD75K1?

Use a spring bar removal tool: position the curved tip beneath the lug retaining pin, apply controlled outward pressure until the internal spring releases, extract the pin. Repeat on the second side. Insert the new strap by aligning the holes with the pins, then push until the retention click engages.

Can an aftermarket strap be used on this model?

Yes, entirely. The SRPD75K1 accepts any 22-millimetre strap. Artisanal Tuscan leather straps offer superior alternatives to the stock strap, with materiality, natural patina development, and personalised comfort. Verify that thickness does not exceed 3 millimetres to avoid friction on the keeper.

How long does a leather strap last on the Seiko 5 Sports SRPD75K1?

A vegetable-tanned leather strap develops patina after 4-6 weeks and reaches aesthetic maturity within 3-4 months. Effective lifespan depends on use: with seasonal rotation and air-drying after immersion, the strap resists 3-5 years before visible wear. Chrome-tanned leather lasts longer (5-7 years) but does not develop patina.

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