The Titanium Field Guide

Makoto Boken 300M Titanium

The Makoto Boken 300M Titanium is a current-production diver watch with a grade 5 titanium case. It is priced under the $1,299 median for the category. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

All Makoto watchesWatch diver watchesUnder $1,000MicrobrandGrade 5 titanium
Price
$950
Material
Titanium
Grade / type
Grade 5
Water resistance
300 m
Type
Diver
Case diameter
40.0 mm
Thickness
11.5 mm
Lug-to-lug
47 mm
Origin
Canada
Movement
Automatic
Caliber
Miyota 90S5
Complications
Time only
Colour
Grey
Surface treatment
None
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Maker states none
Bracelet / strap
FKM rubber strap (titanium buckle)
Display back
No
Lume
Super-LumiNova BGW9
Availability
Offered
Status
Pre-order (ships Oct 2026)
Not published
Reference, Weight, Power reserve, Hardness, Construction, Matching bracelet, Crystal, Dial
High confidence Verified Sep 2026 Source: Makoto Spec checksGrade Jul 2026Price Jul 2026
Facts are free to cite with a link.
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More watches from Makoto

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Frequently asked questions

Is the Makoto Boken 300M Titanium nickel-free?

On the maker's published specification, no nickel-bearing steel touches the skin: a grade 5 titanium case with a titanium caseback, plus a non-steel crown and strap. That is what the guide records rather than a test of the watch, so confirm the contact points with the maker before buying if you react to nickel.

What is the case material of the Makoto Boken 300M Titanium?

The Makoto Boken 300M Titanium has a grade 5 titanium case with a titanium caseback. This is confirmed against the maker spec.

What size is the Makoto Boken 300M Titanium?

It is 40.0 mm in diameter, 11.5 mm thick, 47 mm lug to lug, and water resistant to 300 m.

How much does the Makoto Boken 300M Titanium cost, and is it available?

It is current-production and lists from $950.

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