Seiko
Prospex Sky SSC351P1— lug 20mm
Seiko Prospex Sky SSC351P1: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Seiko SSC351P1The essential strap measurement.
Browse 20mm straps →SSC351P1
Seiko caliber V176 Hours, Minutes, Seconds | Chronograph, Rattrapante | Solar Charging
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Prospex Sky
FAQ
What is the exact lug width of the Seiko Prospex Sky SSC351P1?
The lug width of the SSC351P1 is precisely 20 millimetres. This measurement represents the distance between the two vertical lugs that connect the case to the strap. Verifying this dimension is essential before purchasing an aftermarket strap to ensure compatibility.
Which strap type pairs best with the Seiko Prospex Sky SSC351P1?
Given the aviatory character of the SSC351P1, we recommend vegetable-tanned alligator (black or deep brown), shell cordovan for those seeking temporal patina development, or ballistic nylon NATO for genuine maritime contexts. High-density FKM rubber is the versatile choice for alternating between formal and outdoor activities. Selection depends on use case and dial colour palette.
How do I change the strap on the Seiko Prospex Sky SSC351P1?
The process is straightforward: insert a flat tool (plastic strap opener or blunt blade) into the lateral hole of the lug, apply gentle pressure to lift the spring bar, then extract it fully. Repeat on the opposite side. Insert the new strap by aligning the bars into the same holes and press until you hear the click. Never use hammers or tools that might damage the steel.
Is an aftermarket 20mm strap genuinely compatible with the SSC351P1?
Yes, provided the width is exactly 20 millimetres. Verify that the thickness at the insertion point (typically 2.5–3 millimetres) is not excessive, as this could strain the lugs. All 20mm straps in the Milano Straps catalogue are tested for structural compatibility with Seiko cases of this generation.
How long does a natural leather strap last on a daily-use Seiko Prospex Sky SSC351P1?
A quality vegetable-tanned alligator or calf, with regular care (damp cleaning, drying, occasional conditioning with natural waxes), maintains structural and aesthetic integrity for 4–6 years of daily wear. Exposure to perspiration, salt water, and thermal fluctuations accelerates ageing. The natural patina that develops is integral to authentic leather's appeal, not a defect.