The Titanium Field GuidePicks of the month

Isotope Moonshot Chronograph Thunderclap

The Isotope Moonshot Chronograph Thunderclap is a 41 mm Grade 5 titanium chronograph with a Valjoux 7753 automatic movement.

All Isotope watchesChronograph watchesMicrobrandGrade 5 titaniumTitanium bracelet availableDisplay back
Price
≈$4,279 (£3,240)
Material
Titanium
Grade / type
Grade 5
Water resistance
100 m
Type
Chronograph
Case diameter
41.0 mm
Thickness
15 mm
Lug-to-lug
49.5 mm
Origin
United Kingdom
Movement
Automatic chronograph
Caliber
Valjoux 7753
Power reserve
44 hours
Complications
Chronograph
Colour
Grey
Surface treatment
Sand-blasted
Finish technology
Natural finish
Caseback
Sapphire (exhibition, four screws)
Nickel-free
Unconfirmed (clasp or buckle material not confirmed)
Bracelet / strap
Grade 5 titanium bracelet or FKM strap
Matching bracelet
Optional (or strap)
Crystal
Double-domed sapphire, AR
Display back
Yes
Dial
Embossed grey with metallic purple Moondiscs
Dial colours
Grey Purple
Lume
Super-LumiNova X1
Availability
Offered
Status
Current (limited to 30)
Not published
Reference, Weight, Hardness, Construction
High confidence Verified Sep 2026 Source: Isotope (maker product page) Spec checksGrade Jul 2026Price Sep 2026 Suggested by u/Potential-Peace6416
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Frequently asked questions

What grade of titanium is the Isotope Moonshot Chronograph Thunderclap?

Grade 5, as stated by the maker. The caseback is sapphire (exhibition, four screws).

What size is the Isotope Moonshot Chronograph Thunderclap?

The case is 41 mm across, 15 mm thick and 49.5 mm from lug to lug. It is water resistant to 100 m.

How much does the Isotope Moonshot Chronograph Thunderclap cost, and is it available?

It is in production, at a list price of $4,279.

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