Lug-to-lug 44.5 mm 1.75 in
Case 39.5 mm 1.56 in
Thickness 12 mm 0.47 in
Lug width 20 mm 0.79 in
Wrist fit analyzer
Fit reference
Flat wrist width54.1 mmFit ratio0.82
Too smallIdealLargeToo large
Balanced
Likely to sit comfortably within the wrist width for most wearers.
Sources
- https://www.seikowatches.com/kr-ko/products/prospex/spb517j1
Manufacturer page: 39.5 mm case, 44.5 mm lug-to-lug, 12 mm thickness, and 20 mm lug width.
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