Undone · Microbrand · Hong Kong
Undone Basecamp GMT
- Seiko NH34A
- 40 mm × 15 mm
- 100 m water resistance
Where to buy
- Undone (Stealth)Worldwide
- Undone (Stealth)Worldwide
- Undone (Stealth)Worldwide
Movement
- Caliber
- Seiko NH34A
- 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
- 40 mm
- Lug to lug
- —
- Thickness
- 15 mm
- Lug width
- 20 mm
- Material
- Steel (316L)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- —
- Case back
- Display
- Bezel
- —
- Colour coating
- black IP
Crystal & dial
- Crystal
- —
- Shape
- Domed
- Anti-reflective
- —
- Lume
- —
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- —
- Solid links
- —
- Link attachment
- —
- Taper
- —
- Quick release
- —
- Half links
- —
- Clasp
- —
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- Rubber, Black rubber strap (Stealth, USD 432 listing)
- Strap 2
- Leather, Black leather strap (Stealth, USD 360 listing)
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
Variants
| Name | Dial | Bezel |
|---|---|---|
| Stealth | black carbon-pattern dial with red GMT hand and a red-framed date at 4:30; black IP case | grey 24-hour scale |
About this entry
42% of key specs known. Missing: lug-to-lug, weight, hardening, crystal, AR coating, crown, lume, bracelet links, end links, link attachment, clasp micro-adjust.
The steel GMT build of Undone's 40mm Basecamp, on the Time Module (Seiko) NH34A with a separately set 24-hour hand; Undone groups these as "Basecamp GMT" (its stone-dial editions use that name). The NH35 Basecamp, the bronze Basecamp GMT Bronze and the titanium Basecamp Titanium GMT are separate models. Spec table on all three Stealth listings: "Japanese GMT NH34 Automatic Winding Mechanism", 316L steel case, "LEXAN Polycarbonate" lens, 40mm excluding the crown, 15mm including the crystal, 10 ATM / 100m. The crystal is a plastic (polycarbonate) one; the schema has no polycarbonate category, so the material is left blank (the page summaries call it domed). The Stealth Leather text describes an "IP black case, vintage treated"; the black bracelet is shown on the Stealth Steel listing (photo file "20mm_bracelet_black"), with no construction or clasp details. The 20mm lug width is from the strap and bracelet photos' file names, not a stated spec. Whether the 24-hour bezel rotates is not stated. No lug-to-lug, weight, lume or crown details are published. Editions. Stealth (listed 2023-11; strap and bracelet listings added 2024-11): black IP case, black carbon-pattern dial, red GMT hand, grey 24-hour bezel. Sold as three listings by fitting: black rubber strap (BCP-CLB-STH, USD 432, sold out on 2026-10-30), black leather strap (BCP-CLB-STL, USD 360) and black steel bracelet (BCP-CLB-STS, USD 400).
Last verified: 2026-10-30. Edit or correct this entry.
Sources
- UNDONE, Basecamp Stealth Steel (SKU BCP-CLB-STS) accessed 2026-10-30
- UNDONE, Basecamp Stealth Leather (SKU BCP-CLB-STL) accessed 2026-10-30
- UNDONE, Basecamp Stealth Automatic (SKU BCP-CLB-STH) accessed 2026-10-30