Isotope · Microbrand · United Kingdom
Isotope Chronograph Moonshot
- ETA Valjoux 7753
- 41 mm × 15 mm
- Sapphire crystal
- 100 m water resistance
Where to buy
- Isotope (Horizon)Worldwide
- Isotope (Stealth)Worldwide
- Isotope (Thunderclap)Worldwide
- Isotope (Terra Maris)Worldwide
Movement
- Caliber
- ETA Valjoux 7753
- Type
- Automatic
- Tier
- Upper
- Complications
- Hours, Minutes, Small seconds, Chronograph
- Frequency
- 28,800 bph
- Power reserve
- 48 h
- Hacking
- Yes
- Accuracy (factory)
- —
- Grade
- Elaboré
- Modifications
- Rotor signed with the Isotope logo (purple on Thunderclap); bespoke Moondisc rotating sub-dial discs
Case
- Diameter
- 41 mm
- Lug to lug
- 49.5 mm
- Thickness
- 15 mm
- Lug width
- 20 mm
- Material
- Titanium (Grade 5)
- Hardening
- —
- Water resistance
- 100 m
- Crown
- Screw-down
- Case back
- Display, screws
- Bezel
- —
- Finishing
- CNC-machined, sandblasted; anti-fingerprint coating (Horizon) or DLC (Stealth)
Crystal & dial
- Crystal
- Sapphire
- Shape
- Double-domed
- Anti-reflective
- Yes (side not stated)
- Lume
- Super-LumiNova Grade X1
Bracelet & clasp
- Style
- —
- Links per row
- —
- Solid end links
- —
- Solid links
- —
- Link attachment
- Screws
- Taper
- 20 → 18 mm
- Quick release
- Yes
- Half links
- —
- Clasp
- Butterfly
- Micro-adjust
- —
- Diver extension
- —
Straps
- Strap 1
- FKM rubber, quick release, 20mm tapering to 18mm cut-to-size FKM (CTS) strap with signed butterfly deployant buckle
Weight
- Head only
- —
- On bracelet
- —
- On strap
- —
Prices
| Variant | Configuration | Type | Price | USD | As of | Source |
|---|---|---|---|---|---|---|
| Horizon | Ti5 bracelet and orange FKM strap | Msrp | 3,340 GBPincl. VAT | $4,452 | 2026-10-24 | link |
| Stealth | DLC Ti5 bracelet and black FKM strap | Msrp | 3,340 GBPincl. VAT | $4,452 | 2026-10-24 | link |
| Thunderclap | purple FKM strap | Msrp | 3,240 GBPincl. VAT | $4,319 | 2026-10-24 | link |
| Thunderclap | purple FKM strap and Ti5 bracelet | Msrp | 3,340 GBPincl. VAT | $4,452 | 2026-10-24 | link |
| Terra Maris | DLC Ti5 bracelet and blue FKM strap | Msrp | 2,700 GBPincl. VAT | $3,599 | 2024-09-11 | link |
Variants
| Name | Dial | Configuration | Status |
|---|---|---|---|
| Horizon | cyan-blue sunburst with silver Moondiscs and orange register rings | Ti5 bracelet and orange FKM strap | Limited (30) |
| Stealth | embossed grey/black with Moondiscs | DLC-coated titanium case; DLC Ti5 bracelet and black FKM strap | — |
| Thunderclap | embossed grey dimple with purple Moondiscs | — | Limited (30) |
| Terra Maris | embossed brown dégradé with blue Moondiscs | DLC-coated titanium case; DLC Ti5 bracelet and blue FKM strap | — |
About this entry
74% of key specs known. Missing: weight, hardening, bracelet links, end links, clasp micro-adjust.
Isotope's tri-compax automatic chronograph, where silver, black or purple aluminium "Moondiscs" rotate over the registers and partly cover them. Shared spec table: sandblasted Grade 5 titanium case 41mm x 15mm, 49.5mm with lugs; double-domed AR sapphire; sapphire exhibition caseback held by four screws; screw-down crown; 100m; Super-LumiNova Grade X1 on the turbine chapter ring and hands; Grade 5 titanium bracelet with screwed links, quick-release and signed butterfly buckle, 20mm tapering to 18mm, plus a cut-to-size FKM strap. Functions: small seconds at 9, 30-minute counter at 3, 12-hour counter at 6; no date is shown (none in the photos), so the 7753's date is recorded as hidden. Movement conflict: the Thunderclap page names only the ETA Valjoux 7753 (27 jewels, Elaboré), and the Horizon description says it uses the Valjoux 7753, but the Horizon and Stealth spec tables say "ETA Valjoux 7753 or Swiss Landeron 73" (27 or 28 jewels, Elaboré or Top decoration), the Stealth page offers "a choice" without a movement option, and Oracle of Time's launch article (Stealth and Terra Maris) gives the Landeron 73 (28 jewels, 42h). The Valjoux 7753 (Elaboré) is recorded as the current caliber; earlier pieces, the Stealth especially, may have the Landeron 73. Isotope quotes 44h of power reserve (ETA's 7753 sheet says 48h). Thunderclap (with artist Teenage Grandpa) has a telemeter scale and purple pushers, Horizon a telemeter and pulsometer scale; both are 30-piece editions. The Stealth (Isotope's first chronograph, case finished with DLC) is numbered but not a limited edition: Oracle of Time reports it was made in batches (25 per colour in the first run, then £2,700) ahead of general production. It was sold out on 2026-10-25 at £3,340. The DLC and anti-fingerprint finishes apply per edition, so case hardening is left blank. Isotope's store prices include UK VAT. The Terra Maris (with journalist Miguel Seabra, following his GMT 0º Terra Maris; DLC-coated case, brown dégradé dial with blue Moondiscs, Ti5 bracelet and blue FKM strap) was launched alongside the Stealth in September 2024 at £2,700 (Oracle of Time; 25 pieces per colourway in the first run) and was sold out and listed without a price on 2026-10-25; Isotope says production "is limited by time and demand". Weight isn't published.
Last verified: 2026-10-25. Edit or correct this entry.
Sources
- Isotope, Chronograph Moonshot Horizon product page (specifications, limited to 30, price) accessed 2026-10-25
- Isotope, Chronograph Moonshot Stealth product page (specifications, sold out) accessed 2026-10-25
- Isotope, Chronograph Moonshot Thunderclap product page (specifications, limited to 30, prices) accessed 2026-10-25
- Isotope, Chronograph Moonshot Terra Maris product page (specifications, sold out, no price shown) accessed 2026-10-25
- Oracle of Time, Isotope Chronograph Compax Moonshot launch article (names the Landeron 73; Stealth and Terra Maris at £2,700) accessed 2026-10-25