Spirit Pilot Flyback 39.5mm
L3.721.4.53.6
How it wears
Wears true to its 39.5 mm case size
Longines Spirit Pilot Flyback 39.5mm measures 47.4 mm lug-to-lug on a 39.5 mm case, a lug-to-lug ratio of 1.20 against a database median of 1.18. That span is longer than 56% of the 7,413 watches in this database and longer than 65% of the 495 Longines watches listed.
A flat wrist width of 53 mm (2.09 in) or more keeps it in the balanced range, and from 64 mm (2.52 in) it starts to look compact. Below 47.4 mm (1.87 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.
At 13.4 mm thick it sits within the typical range, thicker than 69% of the watches with a listed thickness.
Wrist fit analyzer
Fit reference
Sits comfortably within the wrist width for most wearers.
Sources
- https://www.longines.com/kr/p/watch-longines-spirit-pilot-flyback-l3-721-4-53-6
Manufacturer page: 39.5 mm case, 47.4 mm lug-to-lug, 13.4 mm thickness, and 20 mm lug width.
- https://monochrome-watches.com/2025-longines-spirit-pilot-and-spirit-pilot-flyback-chronograph-39mm-price-review/
MONOCHROME reports 47.2mm lug-to-lug, 39mm case size/width, 11.5mm thickness for Longines Spirit Pilot Flyback in “The Compact and Streamlined Longines Spirit Pilot and Spirit Pilot Flyback.”
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