The Titanium Field Guide

Omega Speedmaster HB-SIA Co-Axial GMT Chronograph

321.90.44.52.01.001 Archive · used only

The Omega Speedmaster HB-SIA Co-Axial GMT Chronograph is a discontinued chronograph watch with a Titanium (grade undisclosed) case, finished with brushed and polished. It ships on a matching titanium bracelet rather than a strap. No longer offered new; listed here as an archive reference for the used market.

Titanium chronograph watchesOn a titanium braceletGMT
Titanium
Titanium (grade undisclosed)
Water resistance
100 m
Reference
321.90.44.52.01.001
Type
Chronograph
Price
– · Numbered edition (2013), discontinued; secondary market only
Case diameter
44.3 mm
Origin
Switzerland
Movement
Automatic chronograph, Co-Axial, GMT
Caliber
Omega Co-Axial 3603
Power reserve
52 hours
Complications
Chronograph, GMT
Case shape
Round
Case colour
Natural / grey
Finish technology
Natural finish
Surface treatment
Brushed and polished
Caseback
Titanium
Nickel-free
Not verified (clasp or buckle material not confirmed)
Bracelet / strap
Titanium bracelet
Titanium bracelet
Standard
Crystal
Sapphire, anti-reflective
Display back
No
Dial
Black carbon fibre
Dial colours
Black
Lume
Super-LumiNova
Availability
No longer offered
Status
Numbered edition (2013), discontinued
Not published
Thickness, Lug-to-lug, Weight Help verify
Medium confidence Verified Jun 2026 Source: Omega (maker product page) Maker / listing ↗ Suggested by u/FlakyGood
Facts are free to cite with a link.
Reader reviews & photosContribute photo or review
No reviews yet. Be the first to write one.
See it in the interactive guideGet new-watch alertsContribute a photo or review

Browse all titanium watch comparisons →

Similar titanium watches

Jaeger-LeCoultrePolaris Chronograph Worldtime (Titanium)$18,10044.0 mm12.5 mm thickChronographsame category · same style · similar size · same movement
SeikoAstron GPS Solar Dual-Time Chronograph (5X63)$2,70043.4 mm12.4 mm thickChronographsame category · same style · similar size · same strap
SeikoAstron GPS Solar Chronograph 145th Anniversary LE SSH186$3,30044.1 mm14.4 mm thickChronographsame category · same style · similar size · same strap
SeikoAstron GPS Solar Chronograph 100th Anniversary LE SSH158–43.4 mm14.1 mm thick106 gChronographsame category · same style · similar size · same strapRaymond Weil Freelancer Bi-Compax TitaniumRaymond WeilFreelancer Bi-Compax Titanium$4,39543.5 mmChronographsame category · similar size · same movement · same titanium
TAG HeuerFormula 1 Automatic Chronograph Gulf$6,30044.0 mm14.1 mm thickChronographsame category · similar size · same movement · same strapBreitling Super Chronomat B01 44 (titanium)BreitlingSuper Chronomat B01 44 (titanium)$11,90044.0 mm121 gChronographsame category · similar size · same movement · same titanium
Girard-PerregauxLaureato Absolute Chronograph (Titanium)$15,90044.0 mm14.65 mm thickChronographsame category · similar size · same movement · same titanium

Alternatives to the Omega Speedmaster HB-SIA Co-Axial GMT Chronograph

BulgariOcto Finissimo Chronograph GMT Titanium$17,20042.0 mm6.9 mm thickChronographsame category · same style · shared complications · similar size
SeikoAstron GPS Solar Dual-Time Chronograph (5X83)$2,50042.0 mm12.4 mm thickChronographsame category · same style · shared complications · similar sizeSeiko Astron GPS Solar Dual-Time Chronograph SSH175SeikoAstron GPS Solar Dual-Time Chronograph SSH175$3,10044.1 mm14.4 mm thick110 gChronographsame category · same style · shared complications · similar sizeCitizen Attesa Radio Chronograph Black DLC (Super Titanium)CitizenAttesa Radio Chronograph Black DLC (Super Titanium)$1,19542.0 mm95 gChronographsame category · same style · shared complications · similar sizeCitizen Attesa Platinum Shine Direct Flight (Super Titanium, Platinum DLC)CitizenAttesa Platinum Shine Direct Flight (Super Titanium, Platinum DLC)$1,36042.0 mm95 gChronographsame category · same style · shared complications · similar sizeSugess S464 Titanium ChronographSugessS464 Titanium Chronograph$39946.0 mm16.5 mm thickChronographsame category · shared complications · similar size · same movement

More titanium watches from Omega

OmegaSeamaster Planet Ocean Ultra Deep 6000M (Titanium)$15,30045.5 mm18.12 mm thick123 gDiver
OmegaSeamaster Diver 300M Titanium-Tantalum (LE)$13,00042.0 mm161 gDiver
OmegaSpeedmaster X-33 Marstimer (Titanium)$6,40045.0 mm14.7 mm thick112 gPilot
OmegaSeamaster Aqua Terra Ultra Light (Gamma Titanium)$48,60041.0 mm55 gDress
OmegaSeamaster Diver 300M 007 Edition (Titanium)$11,30042.0 mm95 gDiver
OmegaSeamaster Ploprof 1200M Titanium$9,80055.0 mm175 gDiver

Frequently asked questions

What grade of titanium is the Omega Speedmaster HB-SIA Co-Axial GMT Chronograph?

The Omega Speedmaster HB-SIA Co-Axial GMT Chronograph has a Titanium (grade undisclosed) case with a titanium caseback. It is recorded at medium confidence pending a maker-stated grade.

What size is the Omega Speedmaster HB-SIA Co-Axial GMT Chronograph?

It is 44.3 mm in diameter, and water resistant to 100 m.

How much does the Omega Speedmaster HB-SIA Co-Axial GMT Chronograph cost, and is it available?

It is no longer offered new; the guide keeps it as an archive reference for the used market.

All titanium Omega watches · Titanium chronograph watches · All 1,163 watches

Learn: Titanium grades · Surface treatments · Why titanium scratches · How to read a spec

How we verify & grade · Image & Trademark Policy · Terms & Conditions