The Titanium Field Guide

Seiko Prospex LX Line SNR051

The Seiko Prospex LX Line SNR051 is a current-production watch with a titanium (super titanium) case, finished with super-hard coating. It is priced well above the $1,425 median across the guide. The maker states no nickel-bearing steel at any skin-contact point, across the case, caseback and bracelet.

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Price
$6,000
Material
Titanium
Grade / type
Titanium (Super Titanium)
Water resistance
100 m
Type
Other
Case diameter
44.8 mm
Thickness
14.7 mm
Origin
Japan
Movement
Spring Drive (GMT)
Caliber
Seiko 5R66
Power reserve
72 h
Complications
GMT, Date, Power reserve
Colour
Grey
Surface treatment
Super-hard coating
Finish technology
Surface hardening
Caseback
Titanium
Nickel-free
Maker states none
Bracelet / strap
Titanium
Crystal
Sapphire
Display back
No
Dial
Blue
Dial colours
Blue
Lume
LumiBrite
Availability
Offered
Status
Current
Not published
Reference, Lug-to-lug, Weight, Hardness, Construction, Matching bracelet
High confidence Verified Aug 2026 Source: Seiko Spec checksGrade Jul 2026Price Jul 2026
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Frequently asked questions

Is the Seiko Prospex LX Line SNR051 nickel-free?

On the maker's published specification, no nickel-bearing steel touches the skin: a titanium (super titanium) case with a titanium caseback, plus a non-steel crown and bracelet and clasp. 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 Seiko Prospex LX Line SNR051?

The Seiko Prospex LX Line SNR051 has a titanium (super titanium) case with a titanium caseback. This is confirmed against the maker spec.

What size is the Seiko Prospex LX Line SNR051?

It is 44.8 mm in diameter, 14.7 mm thick, and water resistant to 100 m.

How much does the Seiko Prospex LX Line SNR051 cost, and is it available?

It is current-production and lists from $6,000.

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