When Hamilton improved the prop that carried Cooper’s message across the dimensions in Christopher Nolan’s Interstellar into a production watch, it could hardly have predicted the frenzy that followed. The significance of the Murph, that seconds hand telegraphing “Eureka” in Morse code, made it a cultural phenomenon rather than just another Khaki Field. Now Hamilton has looked past the tesseract and out towards the comet — and dressed the celebrated 38mm case in a comet blue dial that glows like ionised gas rushing past a star.
The new Khaki Field Murph 38mm keeps the exact proportions that made the shorter version such a hit: a 38mm stainless-steel case that is 11.1mm thick, 100 metres of water resistance, sapphire crystal front and back, and a versatile 20mm lug width that shrugs off virtually any strap you want to throw at it. The movement is the enduring H-10 automatic calibre, whose 80-hour power reserve and Nivachron balance spring quietly brushed aside the need for constant winding.
The Comet Blue Dial That Shifts With the Light
What separates this edition from the dozen or so Murphs already in the catalogue is the comet blue dial itself, and Hamilton has clearly gone to some lengths to make it feel celestial rather than merely cosmetic. The centre floods with a vivid, saturated blue before bleeding out to near-black at the perimeter — a deliberate nod to the luminous core and trailing darkness of a comet cutting through space. The surface carries a pronounced grained texture that shifts as light travels across it, giving the impression of stardust hanging in a vacuum. It is a striking, atypical palette for a field watch, and it works because the Murph was never truly a field watch — it is a watch with a story, and this dial leans straight into the narrative.
Around the dial, Hamilton keeps the template that devotees know well: slightly domed Arabic numerals and minute plots in a soft, warm tone, paired with the familiar cathedral-shaped hour and minute hands filled with Super-LumiNova and that long, unmistakable seconds hand. The absence of a date window preserves the clean military motif and keeps the upper hand of the movement’s architecture uncluttered. Through the open caseback, the H-10’s self-winding rotor and its decorated bridges take centre stage, a reminder that beneath the cinematic surface sits a workhorse of genuine technical substance.
The H-10 calibre deserves a closer look. Derived from the ETA C07 architecture, it winds automatically and stores 80 hours of power reserve — more than three full days off the wrist — while its Nivachron balance spring resists magnetic fields, temperature shifts and shocks with a robustness that suits an everyday beater. At 28,800 vph it keeps reliable, steady timekeeping, and the exhibition caseback lets you watch the oscillating weight do its work.
Hamilton offers the comet-dial Murph in two guises. The bracelet reference H70405140 pairs the blue dial with a brushed stainless-steel bracelet and folding clasp fitted with the brand’s Easy Click quick-release system for tool-free strap changes. Alternatively, reference H70405740 arrives on a black calf-leather strap with contrasting white stitching and a pin buckle, echoing the prop’s on-screen character more directly.
Pricing lands the bracelet version at CHF 945, USD 995 in the States, while the leather edition costs CHF 870, USD 1,075. Both are available now through Hamilton retailers and the brand’s online store. For anyone who has connected with the emotional pull of the Murph — and that is a very large crowd indeed — this blue edition finally gives the watch a dial that belongs as much to space as to the wrist. It carries a message through time once more, this time with a little more of the journey painted on its face.
Specifications
| Reference | H70405140 (bracelet) / H70405740 (leather strap) |
|---|---|
| Case | Stainless steel, 38mm diameter, 11.1mm thick |
| Bezel | Polished stainless steel |
| Crystal | Sapphire, anti-reflective, front and exhibition caseback |
| Water Resistance | 100 metres (10 bar) |
| Dial | Blue-to-black comet gradient, grained stardust texture, domed Arabic numerals |
| Hands | Cathedral hour and minute hands, nickel-plated, Super-LumiNova filled |
| Lume | Super-LumiNova on hands and hour markers |
| Movement | Calibre H-10 automatic, ETA C07 base, 28,800 vph |
| Power Reserve | 80 hours |
| Functions | Hours, minutes, seconds |
| Bracelet / Strap | Stainless steel bracelet with folding clasp and Easy Click (H70405140) / black calf leather with pin buckle (H70405740) |
| Price | CHF 945 / USD 995 (bracelet); CHF 870 / USD 1,075 (leather) |
The Murph’s celestial makeover is a reminder of how far a simple three-hander can travel when it carries a decent backstory and an honest movement. This guide to power reserve explains why those 80 hours of autonomy matter so much in a daily wearer. For the fundamentals behind the sapphire box protecting that comet dial, this breakdown of watch crystal materials is the place to go. And if you are still weighing a field watch against a diver or a dress piece, this field-vs-diver-vs-dress comparison will help you decide.
