Longines Spirit 40mm

Ref. L3.810.4.53.6

Case diameter: 40 mm; Manufacturer spec
Lug-to-lug: 49.7 mm; Manufacturer spec
Thickness: 12.2 mm; Manufacturer spec
Lug width: 21 mm; Manufacturer spec

Retail price $2,550 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 49.7 mm

How the Longines Spirit 40mm wears

Its lugs reach 9.7 mm past the 40 mm case, more than the 7.1 mm typical across the almanac, so it wears larger than its diameter suggests.

On our fit model it sits best on wrists from 7" to 8.25" (17.8–21.0 cm); below 7" the lugs start to reach the edge of the wrist.

At 12.2 mm thick it is thicker than 57% of the 14 other pilot watches we've measured, so expect it to sit tall on the wrist.

Its 21 mm lug width is one of the most common strap sizes; 28 other watches here share it, so aftermarket straps are easy to find.

Will the Longines Spirit 40mm fit your wrist?

With a 49.7 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Lugs overhang
6.5"	51.2 mm	Snug, lugs near the edge
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Ideal fit

Specifications

Reference: L3.810.4.53.6
Collection: Spirit
Status: In production
Case material: stainless steel
Crystal: sapphire, AR both sides
Water resistance: 100 m
Bezel: fixed
Dial: black
Strap / bracelet: steel bracelet, triple-safety folding clasp
Style: Pilot, Everyday

Movement

Caliber: Longines L888.4
Type: automatic
Power reserve: 72 hours
Frequency: 25,200 vph (3.5 Hz)
Accuracy: COSC-certified

Takes 21 mm straps. See other 21 mm watches and straps.

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 21 mm lug width

All 21 mm watches

These take the same straps as the Longines Spirit 40mm.