Evolution 9 Hi-Beat 36000 80 Hours Titanium 'Night Birch'

Ref. SLGH029 · “Night Birch”

Case diameter: 40 mm; Manufacturer spec
Lug-to-lug: 47 mm; Manufacturer spec
Thickness: 11.7 mm; Manufacturer spec
Lug width: 22 mm; Manufacturer spec

Retail price $11,400 (US, Oct 2026)

Your wristIdeal fit

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

How the Evolution 9 Hi-Beat 36000 80 Hours Titanium 'Night Birch' wears

Its lugs add 7 mm to the 40 mm case, close to the 7 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 11.7 mm thick it is slimmer than 70% of the 82 other sport watches we've measured, so it slides under a cuff more easily than most.

Its 22 mm lug width is one of the most common strap sizes; 42 other watches here share it, so aftermarket straps are easy to find.

Will the Evolution 9 Hi-Beat 36000 80 Hours Titanium 'Night Birch' 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: SLGH029
Collection: Evolution 9
Status: In production
Case material: High-Intensity Titanium
Crystal: box-shaped sapphire (inner AR coating)
Water resistance: 100 m
Bezel: fixed polished bezel
Dial: black (birch-bark texture)
Strap / bracelet: High-Intensity Titanium bracelet, micro-adjustment clasp
Style: Sport, Everyday

Movement

Caliber: Grand Seiko 9SA5
Type: automatic
Power reserve: 80 hours
Frequency: 36,000 vph (5 Hz)
Accuracy: +5/-3 s/day (static); +8/-1 s/day normal use

Takes 22 mm straps. See other 22 mm watches and straps.

More Evolution 9 references

Watches that wear the same size

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

Same 22 mm lug width

All 22 mm watches

These take the same straps as the Evolution 9 Hi-Beat 36000 80 Hours Titanium 'Night Birch'.