Chronograph 1 Mk.2

Case diameter: 38 mm; Manufacturer spec
Lug-to-lug: 46.8 mm; Manufacturer spec
Thickness: 13.5 mm; Manufacturer spec
Lug width: 20 mm; Manufacturer spec

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 46.8 mm

How the Chronograph 1 Mk.2 wears

Its lugs reach 8.8 mm past the 38 mm case, more than the 7 mm typical across the almanac, so it wears larger than its diameter suggests.

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 13.5 mm thick it is slimmer than 60% of the 40 other chronograph 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; 156 other watches here share it, so aftermarket straps are easy to find.

Will the Chronograph 1 Mk.2 fit your wrist?

With a 46.8 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: Chronograph 1 Mk.2
Collection: Chronograph
Status: Discontinued
Case material: 316L stainless steel, high-polished
Crystal: sapphire box crystal
Water resistance: 30 m
Bezel: none
Dial: kakishibu-iro (persimmon brown)
Strap / bracelet: calf leather strap
Style: Chronograph, Dress

Movement

Caliber: Seiko Instruments (SII) NE86
Type: automatic
Power reserve: 45 hours
Frequency: 28,800 vph (4 Hz)
Jewels: 34

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 Chronograph 1 Mk.2.

Sources

kuronotokyo.com/pages/chronograph-1-mk-2