The Titanium Field Guide

Lum-Tec M54 Bronze

Archive · used only

The Lum-Tec M54 Bronze is a discontinued watch with a cusn8 bronze case. At 150 g it sits among the heavier watches in the guide, and is priced well under the $1,361.50 median across the guide. No longer offered new; listed here as an archive reference for the used market.

All Lum-Tec watchesExotic-material other watchesUnder $1,000MicrobrandLightest, ranked
Price
$790
Material
Bronze
Grade / type
CuSn8 bronze
Weight
150 g (with strap)
Water resistance
300 m
Type
Other
Case diameter
44.0 mm
Thickness
14.5 mm
Origin
United States
Movement
Japanese automatic
Caliber
Seiko NH35
Power reserve
41 hours
Complications
Date
Construction
Assembled
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Leather and rubber straps
Crystal
Sapphire
Display back
No
Dial
Brown
Dial colours
Brown
Lume
MDV 8-layer lume
Availability
No longer offered
Status
Archive, limited to 200 pieces
Not published
Reference, Lug-to-lug, Colour, Hardness, Surface treatment, Caseback, Matching bracelet
Medium confidence Verified Jul 2026 Source: Princeton Watches / Blade HQ
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Lum-Tec M54 Bronze?

The Lum-Tec M54 Bronze has a cusn8 bronze case. It is recorded at medium confidence pending a maker-stated material.

What size is the Lum-Tec M54 Bronze?

It is 44.0 mm in diameter, 14.5 mm thick, and water resistant to 300 m.

How much does the Lum-Tec M54 Bronze weigh?

About 150 g (w/ strap).

How much does the Lum-Tec M54 Bronze cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market, and it listed from $790 when current.

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