ProPilot X Calibre 400

Ref. 01 400 7778 7155-07 7 20 01TLC

Case diameter: 39 mm; Manufacturer spec
Lug-to-lug: 47 mm; Measured in a published review
Thickness: 11.8 mm; Measured in a published review
Lug width: 20 mm; Manufacturer spec

Retail price $4,800 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 47 mm

How the ProPilot X Calibre 400 wears

Its lugs add 8 mm to the 39 mm case, close to the 7.1 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.

At 11.8 mm thick it is slimmer than 79% of the 14 other pilot watches we've measured, so it slides under a cuff more easily than most.

Its 20 mm lug width is one of the most common strap sizes; 104 other watches here share it, so aftermarket straps are easy to find.

Will the ProPilot X Calibre 400 fit your wrist?

With a 47 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	Ideal fit
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Wears small

Specifications

Reference: 01 400 7778 7155-07 7 20 01TLC
Collection: ProPilot X
Status: In production
Case material: titanium
Crystal: sapphire
Water resistance: 100 m
Bezel: fixed, turbine-style
Dial: blue
Strap / bracelet: titanium bracelet
Style: Pilot, Sport

Movement

Caliber: Oris Oris Calibre 400
Type: automatic
Power reserve: 120 hours
Frequency: 28,800 vph (4 Hz)

Takes 20 mm straps. See other 20 mm watches and straps.

Watches that wear the same size

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

Same 20 mm lug width

All 20 mm watches

These take the same straps as the ProPilot X Calibre 400.