Unimatic · Microbrand · Italy

Unimatic Modello Uno U1 GMT

Ref. U1-GMT · Limited · 2024 · Diver, GMT

Unimatic Modello Uno U1-GMT
Photo: Unimatic
  • Unimatic Modello Uno U1-GMT-AEB Impronte
  • Unimatic Modello Uno U1-GMT-AEG Impronte
  • Unimatic Modello Uno U1-GMT-DHB Diving Heritage
  • Unimatic Modello Uno U1-GMT-DHBR Diving Heritage
  • Unimatic Modello Uno U1-GMT-DHN Diving Heritage
  • Unimatic Modello Uno U1-GMT-TSP Tennis
  • Unimatic Modello Uno U1-SPG Massena LAB
From $932 to $1,295
  • Seiko NH34A
  • 41.5 mm × 14.4 mm
  • Sapphire crystal
  • 300 m water resistance

Movement

Type
Automatic
Tier
Entry
Complications
Date, GMT
Frequency
21,600 bph
Power reserve
41 h
Hacking
Yes
Accuracy (factory)
-20 / +40 s/day

Case

Diameter
41.5 mm
Lug to lug
49 mm
Thickness
14.4 mm
Lug width
22 mm
Material
Steel (316L)
Hardening
—
Water resistance
300 m
Crown
Screw-down
Case back
Solid, screw-down
Bezel
Unidirectional, 120 clicks
Finishing
Brushed

Crystal & dial

Crystal
Sapphire
Shape
Double-domed
Anti-reflective
Inner
Lume
Super-LumiNova (colour varies by edition)

Bracelet

Bracelet
—

Straps

Strap 1
Nylon, quick release, Two-piece nylon strap with nylon keeper, quick-release; on U1-SPG in tequila sunrise orange with an orange Cerakote buckle, plus an extra black one
Strap 2
Nylon, Black two-piece nylon strap with a safety yellow three-layer nylon keeper and sandblasted hardware signed UNIMATIC (U1-GMT-TSP)
Strap 3
NATO, Black and olive drab seatbelt NATO straps with brushed steel hardware signed UNIMATIC (U1-GMT-AEB, U1-GMT-AEG)
Strap 4
Other, quick release, Tapered 22-20mm two-piece TPU strap with brushed steel hardware signed UNIMATIC, in charcoal grey (U1-GMT) or black, tropic brown and vintage navy (Diving Heritage editions)

Weight

Head only
90 g
On bracelet
—
On strap
108 g

Prices

VariantConfigurationTypePriceUSDAs ofSource
U1-GMT—Msrp830 EURincl. VAT$9322026-10-25link
U1-GMT-AEB Impronte—Msrp915 EURincl. VAT$1,0272026-10-25link
U1-GMT-AEG Impronte—Msrp915 EURincl. VAT$1,0272026-10-25link
U1-GMT-DHB Diving Heritage—Msrp915 EURincl. VAT$1,0272026-10-25link
U1-GMT-DHBR Diving Heritage—Msrp915 EURincl. VAT$1,0272026-10-25link
U1-GMT-DHN Diving Heritage—Msrp915 EURincl. VAT$1,0272026-10-25link
U1-GMT-TSP Tennis—Msrp920 EURincl. VAT$1,0332026-10-25link
U1-SPG Massena LAB—Msrp1,295 USD$1,2952025-03-12link

Variants

NameReferenceDialBezelConfigurationStatus
U1-GMTU1-GMTmatte black, C1 white lume, cool grey open seconds rail and trims, date at 6matte black 24-hour insertcharcoal grey tapered quick-release two-piece TPU strapLimited (300)
U1-GMT-AEB ImpronteU1-GMT-AEBmatte black, C1 lume, debossed open seconds rail and trimsmatte black 24-hour insert, raised odd numeralsblack seatbelt NATO + olive drab seatbelt NATOLimited (250)
U1-GMT-AEG ImpronteU1-GMT-AEGaluminium colour, C1 lume, debossed open seconds rail and trimssandblasted aluminium 24-hour insert, raised odd numeralsolive drab seatbelt NATO + black seatbelt NATOLimited (250)
U1-GMT-DHB Diving HeritageU1-GMT-DHBmatte black, GL light old radium lume, matte white open seconds rail and trimsmatte black heritage diver 24-hour insertblack tapered quick-release two-piece TPU strapLimited (300)
U1-GMT-DHBR Diving HeritageU1-GMT-DHBRtropical brown, GL light old radium lume, matte white open seconds rail and trimsmatte black heritage diver 24-hour inserttropic brown tapered quick-release two-piece TPU strapLimited (300)
U1-GMT-DHN Diving HeritageU1-GMT-DHNvintage navy, GL light old radium lume, matte white open seconds rail and trimsmatte black heritage diver 24-hour insertvintage navy tapered quick-release two-piece TPU strapLimited (300)
U1-GMT-TSP TennisU1-GMT-TSPclay-court red heavy grené, GL C1 lume, dark yellow lume on the seconds hand, matte white 24-hour markersmatte black aluminium minimal insert, raised lume dotblack nylon two-piece strap with safety yellow keeperLimited (99)
U1-SPG Massena LABU1-SPGmatte black, luminous NASA logo, 24-hour scale, GL light old radium lume, no datematte black ceramic 60-minute diving insert, armour black Cerakote bezeltequila sunrise quick-release nylon strap + black quick-release nylon strapLimited (99)

About this entry

87% of key specs known. Missing: hardening, bracelet offered.

The GMT version of the Modello Uno U1: the same case on a Seiko NH34A with an independent 24-hour hand, sold as numbered limited editions, each recorded as a variant. The Hodinkee U1-HGMT, on a Sellita SW330-2 in a slimmer case, is a separate model. Common specification, from Unimatic's U1-GMT-AEB spec sheet: 40mm case, 41.5mm across the bezel (recorded as the diameter), 49mm lug to lug, 13.2mm without the crystal and 14.4mm with it, 28.4mm case opening, 22mm lugs, 316L steel, 8mm screw-down crown, screw-down caseback, individually tested to 300m, 120-click mono-directional bezel, 2.5mm double-domed sapphire with anti-reflective coating on the inner side, 90g head and 108g on a NATO strap; Unimatic quotes -20/+40 s/day and a power reserve over 41h, with no regulation claim. Bezel insert, case coating, date window and straps vary by edition, so complications are left to the movement (NH34, date and GMT) and the date window is noted per edition. Prices are Unimatic's euro prices for Italy, VAT included; where the store shows 0, the price comes from launch coverage. Edition details. U1-GMT (2024, 300), the first edition: matte black dial with C1 lume and cool grey trims, date window at 6, charcoal grey TPU strap, 'Unimatic Timezone' caseback; its page links no spec sheet and its description calls the steel 316; Acquire's launch report (August 2024) says 100 pieces and gives a 600-675 EUR range for it and the U4-GMT (apparently before VAT), where Unimatic's page says 300, recorded. U1-GMT-DHB, U1-GMT-DHBR and U1-GMT-DHN (2025, 300 each, Diving Heritage): black, tropical brown or vintage navy dial with GL light old radium lume, heritage diver 24-hour insert, 2.7mm crystal, matching TPU strap, Diving Heritage caseback; their sheets give 92g head and 107g on the strap. U1-SPG (2025, 99) was made with Massena LAB for NASA's Artemis program and sold only through Massena LAB: steel case in tequila sunrise (burnt orange) Cerakote, armour black Cerakote bezel and crown, matte black ceramic diving insert, NASA logo on the dial, no date window in the photos, Artemis caseback engraving. Its page links no spec sheet and its description calls the steel 316; Monochrome gives the same 40/41.5mm case and 13.2mm thickness; no weight is published for it. The store shows 0, so the price is the 1,295 USD launch price from Monochrome. U1-GMT-AEB and U1-GMT-AEG (2026, 250 each, Impronte collection): black or aluminium-colour dial and matching 24-hour insert with raised odd numerals, 'wrinkled' caseback, two seatbelt NATO straps; the year is from Fratello's launch article (August 2026), as the pages carry no year tag. U1-GMT-TSP (2026, 99, Tennis Collection): sandblasted case, clay-court red grené dial with 24-hour markers, tennis-ball caseback; its description calls the insert ceramic, but its spec sheet says aluminium, recorded; its sheet gives 93g head and 108g on the strap; no year tag on the page, year from WAQT.

Last verified: 2026-10-25. Edit or correct this entry.

Sources