Unimatic · Microbrand · Italy
Unimatic Modello Uno UT1 GMT
- Ronda 515.24D
- 41.5 mm × 13.6 mm
- Sapphire crystal
- 300 m water resistance
Where to buy
Movement
- Caliber
- Ronda 515.24D
- Type
- Quartz
- Tier
- Mid
- Complications
- Date, GMT
- Frequency
- n/a
- Power reserve
- n/a
- Hacking
- n/a
- Accuracy (factory)
- -10 / +20 s/month
Case
- Diameter
- 41.5 mm
- Lug to lug
- 49 mm
- Thickness
- 13.6 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, 60-minute countdown, aluminum insert
- Finishing
- Sandblasted
Crystal & dial
- Crystal
- Sapphire
- Shape
- Flat
- Anti-reflective
- Inner
- Lume
- Super-LumiNova C1
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- —
- Solid links
- —
- Link attachment
- —
- Taper
- —
- Quick release
- Yes
- Half links
- —
- Clasp
- —
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- Nylon, quick release, Black two-piece nylon strap with nylon keeper, sandblasted hardware signed UNIMATIC
Weight
- Head only
- 84 g
- On bracelet
- —
- On strap
- 97 g
Prices
Variants
| Name | Reference | Dial | Bezel | Status |
|---|---|---|---|---|
| UT1-GMT | UT1-GMT | matte black, printed Arabic numerals, 24-hour window at 12 with orange pointer, date at 6, C1 lume, white open seconds rail, international orange trims and seconds tip | matte black aluminium countdown insert | In production |
About this entry
74% of key specs known. Missing: hardening, bracelet links, end links, link attachment, clasp micro-adjust.
The GMT version of the Modello Uno UT1, launched with it in July 2024 in Unimatic's permanent Toolwatch collection (Fratello): the same sandblasted case and 360° protection system (TPU gasket above the dial and TPU movement holder, MIL-STD-810H certified according to Unimatic), but on a Swiss Ronda 515.24D quartz instead of the UT1's Seiko VH31, so a separate model. The second time zone is read in 24-hour format on a disc through a window at 12 with an orange pointer, and the date window is at 6; Ronda's instructions set the date and the 24-hour disc from the crown's middle position, which matches Fratello's hands-on. Specification from Unimatic's UT1-GMT spec sheet: 40mm case, 41.5mm across the bezel (recorded as the diameter), 49mm lug to lug, 13.2mm without the crystal and 13.6mm with it (Fratello quotes 13.2mm), 28.4mm case opening, 22mm lugs, 316L steel, 8mm screw-down crown, screw-in caseback, individually tested to 300m, 120-click mono-directional bezel with matte black countdown insert (aluminium per Fratello), 2.5mm flat sapphire with anti-reflective coating on the inner side, 84g head and 97g on the strap. Unimatic quotes -1/+20 s/month and about 45 months on an SR920SW cell; Ronda's instructions give -10/+20 s/month. Prices are Unimatic's euro prices for Italy, VAT included. The watch is also sold as a 'Bracelet Premium Set' (ref. UT1-GMT-UBR) with Unimatic's UBR-TLQ18 sandblasted steel bracelet with integrated quick-release, the nylon strap and a tough case instead of the travel pouch, recorded as a second price; no clasp details are published.
Last verified: 2026-10-25. Edit or correct this entry.
Sources
- UNIMATIC, Modello Uno UT1-GMT (product page) accessed 2026-10-25
- UNIMATIC, Modello Uno UT1-GMT Bracelet Premium Set, ref. UT1-GMT-UBR (product page) accessed 2026-10-25
- UNIMATIC, Modello Uno UT1-GMT tech specs (PDF) accessed 2026-10-25
- UNIMATIC, Modello Uno UT1-GMT-UBR tech specs (PDF; adds the bracelet) accessed 2026-10-25
- Fratello, Unimatic Adds The New Toolwatch Series To Its Permanent Collection (UT1, UT1-GMT, UT4, UT4-GMT, July 2024) accessed 2026-10-25
- Silodrome, The Unimatic UT1-GMT: An Affordable Italian-Made Tool Watch (2025) accessed 2026-10-25
- Ronda, Technical instructions No. 314.3: calibers 505.24D/H, 509, 515.24D/H, 519 (PDF hosted by Flume) accessed 2026-10-25

