The Titanium Field Guide

Maratac Alto Mare 500M GMT Titanium

The Maratac Alto Mare 500M GMT Titanium is a current-production diver watch with a grade 5 titanium case. At 159 g it sits among the heavier diver watches in the guide, and is priced well under the $1,299 median for the category. It ships on a matching titanium bracelet rather than a strap.

All Maratac watchesWatch diver watchesUnder $1,000MicrobrandLightest, rankedGrade 5 titaniumOn a titanium braceletGMT
Price
$749
Material
Titanium
Grade / type
Grade 5
Weight
159 g
Water resistance
500 m
Type
Diver
Case diameter
42.0 mm
Thickness
15.75 mm
Lug-to-lug
50 mm
Origin
United States
Movement
Automatic GMT (true GMT)
Caliber
Miyota 9075
Power reserve
42h
Complications
GMT, Date
Colour
Grey
Surface treatment
None
Finish technology
Natural finish
Nickel-free
Unconfirmed (contact-point materials not all confirmed)
Bracelet / strap
Grade 5 titanium bracelet (plus mil band)
Matching bracelet
Standard
Crystal
Domed sapphire
Display back
No
Dial
Black
Dial colours
Black
Lume
Swiss Super-LumiNova X1 (C3)
Availability
Offered
Status
Current (between batches)
Not published
Reference, Hardness, Construction, Caseback
Medium confidence Verified Sep 2026 Source: CountyComm (Maratac) Spec checksGrade Sep 2026Price Jun 2026Weight Jun 2026
Facts are free to cite with a link.
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Alternatives to the Maratac Alto Mare 500M GMT Titanium

SteinhartOcean One Titanium 500 GMT Premium Ceramic$82042.0 mm13 mm thickDiversame category · same style · shared complications · similar priceSteinhart Ocean 39 GMT Titan Premium CeramicSteinhartOcean 39 GMT Titan Premium Ceramic$91539.0 mm13.7 mm thick90 gDiversame category · same style · shared complications · similar priceHelm Togiak Expedition UTCHelmTogiak Expedition UTC$38042.0 mm14 mm thick145 gDiversame category · same style · shared complications · similar priceMINUS-8 Diver GMT (Titanium)MINUS-8Diver GMT (Titanium)$49840.0 mm13 mm thick120 gDiversame category · same style · shared complications · similar priceSignum Cuda Titanium GMTSignumCuda Titanium GMT$49942.5 mm13.4 mm thickDiversame category · same style · shared complications · similar priceADPT Series 1 Dual-TimeADPTSeries 1 Dual-Time$49938.0 mm13.6 mm thickDiversame category · same style · shared complications · similar price

More watches from Maratac

Maratac Titanium Field AutomaticMaratacTitanium Field Automatic$59940.0 mm13 mm thick77 gFieldMaratac Large Titanium GMT (Gen 2)MaratacLarge Titanium GMT (Gen 2)$39944.0 mm12 mm thick45.2 gOtherMaratac LSA Homage 300M DiverMaratacLSA Homage 300M Diver$59941.0 mm14 mm thick51 gDiver
MaratacBronze Pilot Automatic$59540.0 mm13 mm thick85 gPilot

Frequently asked questions

What is the case material of the Maratac Alto Mare 500M GMT Titanium?

The Maratac Alto Mare 500M GMT Titanium has a grade 5 titanium case. It is recorded at medium confidence pending a maker-stated material.

What size is the Maratac Alto Mare 500M GMT Titanium?

It is 42.0 mm in diameter, 15.75 mm thick, 50 mm lug to lug, and water resistant to 500 m.

How much does the Maratac Alto Mare 500M GMT Titanium weigh?

About 159 g.

How much does the Maratac Alto Mare 500M GMT Titanium cost, and is it available?

It is current-production and lists from $749.

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