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 $1,300 median for the category. Nothing touching the skin is nickel-bearing steel, verified across the case, caseback and bracelet.

Titanium diver watchesUnder $1,000MicrobrandGrade 5 titanium
Price
$950
Titanium
Grade 5
Water resistance
300 m
Nickel-free
Yes
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
Case shape
Round
Case colour
Natural / grey
Finish technology
Natural finish
Surface treatment
None
Caseback
Titanium
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, Titanium bracelet, Crystal, Dial Help verify
High confidence Verified Jul 2026 Source: Makoto Maker / listing ↗
Facts are free to cite with a link.
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More titanium watches from Makoto

Makoto ShibuyaMakotoShibuya$76639.0 mm11.5 mm thickField

Frequently asked questions

Is the Makoto Boken 300M Titanium nickel-free?

Yes. Nothing nickel-bearing touches the skin: a Grade 5 titanium case with a titanium caseback, plus a non-steel crown and strap. The Titanium Field Guide marks it nickel-free for whole-watch skin contact. If your allergy is severe, confirm the contact points with the maker.

What grade of titanium is 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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