The Titanium Field Guide

Casio MR-G MRG-B2000 Kurogane-iro

MRG-B2000BG-3A

The Casio MR-G MRG-B2000 Kurogane-iro is a current-production watch with a Titanium (Ti64, deep-layer hardened, green DLC) case, finished with deep-layer hardened titanium with green dlc and arc ion plating. Nothing touching the skin is nickel-bearing steel, verified across the case, caseback and bracelet.

Titanium other watchesSolar
Titanium
Titanium (Ti64, deep-layer hardened, green DLC)
Water resistance
200 m
Nickel-free
Yes
Reference
MRG-B2000BG-3A
Type
Other
Case diameter
49.8 mm
Thickness
16.9 mm
Lug-to-lug
54.7 mm
Origin
Japan
Movement
Tough Solar, Multi-Band 6, Bluetooth
Caliber
Casio 5666
Complications
Date
Case shape
Round
Case colour
Green
Finish technology
Coloured DLC
Surface treatment
Deep-layer hardened titanium with green DLC and arc ion plating
Caseback
Titanium
Bracelet / strap
Titanium (green DLC)
Crystal
Sapphire
Display back
No
Dial
Dark blue-green (kurogane-iro)
Dial colours
Blue Green
Lume
Neobrite
Availability
Offered
Status
Limited edition (Kurogane-iro)
Not published
Price, Weight, Power reserve, Titanium bracelet Help verify
Medium confidence Verified Jul 2026 Source: Casio (MRG-B2000BG-3A) / Casio (MRG-B2000RG-3A) Maker / listing ↗
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Frequently asked questions

Is the Casio MR-G MRG-B2000 Kurogane-iro nickel-free?

Yes. Nothing nickel-bearing touches the skin: a Titanium (Ti64, deep-layer hardened, green DLC) case with a titanium caseback, plus a non-steel crown and bracelet and clasp. 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 Casio MR-G MRG-B2000 Kurogane-iro?

The Casio MR-G MRG-B2000 Kurogane-iro has a Titanium (Ti64, deep-layer hardened, green DLC) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated grade.

What size is the Casio MR-G MRG-B2000 Kurogane-iro?

It is 49.8 mm in diameter, 16.9 mm thick, 54.7 mm lug to lug, and water resistant to 200 m.

How much does the Casio MR-G MRG-B2000 Kurogane-iro cost, and is it available?

It is current-production; the guide does not list a price for it.

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