Prospex Alpinist 39.5mm
SPB117J1
How it wears
Wears true to its 39.5 mm case size
Seiko Prospex Alpinist 39.5mm measures 46.4 mm lug-to-lug on a 39.5 mm case, a lug-to-lug ratio of 1.17 against a database median of 1.18. That span is shorter than 57% of the 7,421 watches in this database and shorter than 44% of the 390 Seiko watches listed.
A flat wrist width of 52 mm (2.05 in) or more keeps it in the balanced range, and from 62 mm (2.44 in) it starts to look compact. Below 46.4 mm (1.83 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.
Wrist fit analyzer
Fit reference
Sits comfortably within the wrist width for most wearers.
Sources
- https://sf.delugs.com/api/strap-finder
Delugs Strap Finder API lists 39.5mm case diameter, 46.4mm lug-to-lug distance, 20mm lug width for Seiko Prospex Alpinist SPB117J1.
- https://monochrome-watches.com/seiko-prospex-1959-alpinist-modern-re-interpretation-watches-spb241j1-spb243j1-spb245j1-hands-on-review-price/
MONOCHROME reports 46.2mm lug-to-lug, 38mm case size/width for Seiko Prospex Alpinist in “The Seiko Prospex 1959 Alpinist Modern Re-Interpretation Watches.”
- https://monochrome-watches.com/seiko-prospex-alpinist-gmt-spb377-spb379-long-awaited-dual-time-exploration-adventure-watch-hands-on-review-price/
MONOCHROME reports 46.4mm lug-to-lug, 39.5mm case size/width for Seiko Prospex Alpinist in “The Seiko Prospex Alpinist SPB377 and SPB379, Even Better Now with a GMT Function.”
- https://monochrome-watches.com/seiko-prospex-alpinist-night-sky-spb531-europe-exclusive-edition-introducing-price/
MONOCHROME reports 46.4mm lug-to-lug, 39.5mm case size/width, 13.2mm thickness for Seiko Prospex Alpinist in “The Europe-Exclusive Seiko Prospex Alpinist Night Sky SPB531.”
- https://monochrome-watches.com/hands-on-seiko-prospex-alpinist-gmt-mechanical-limited-edition-spb409-specs-price/
MONOCHROME reports 46.4mm lug-to-lug, 39.5mm case size/width for Seiko Prospex Alpinist in “The New Seiko Prospex Alpinist GMT Limited Edition SPB409.” The article's explicit planar case length/top-to-bottom dimension is stored as the lug-to-lug equivalent.
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