The Khaki Field Murph 38mm is Hamilton's open-dial interpretation of the watch worn by the character Murph in Christopher Nolan's Interstellar, rendered as a production piece rather than a prop replica. H70605731 is the current skeletonized version, where the dial cutouts expose the H-10 movement so the seconds hand sweeps directly across the gear train. At 38mm it sits at a genuinely wearable size for the design, and the 80-hour power reserve makes it a practical daily wearer despite the cinematic backstory.
What it is
Hamilton released the Murph in 2019 alongside the film's fifth-anniversary celebration, initially as a limited closed-dial version before introducing the open-worked production model (H70605731) that continues today. The caliber is the H-10, Hamilton's designation for the ETA C07.611, a silicon-escapement automatic with an 80-hour power reserve and a 21,600 vph beat rate. The open dial was not part of the original 2019 limited release; that edition had a solid dial with printed indices and is now discontinued.
H70605731 replaced it as the ongoing catalog reference and has remained in steady production through at least 2025. No significant movement changes have occurred across the production run.
Buying notes
The open-worked dial requires closer inspection for hairline fractures along the cutout edges, which can result from impact or improper handling during a prior service. Confirm the caseback seal is intact, since the 50m water resistance depends on a crown that is not screw-down. Lug finish on the 38mm case scratches easily and polishing removes the brushed texture irreversibly, so check whether prior owners maintained the original surface.
The printed Interstellar and Hamilton text on the dial can wear unevenly if the crystal has been replaced or refinished carelessly. Verify the crown operates smoothly through all positions; the ETA-based movement is reliable but a sticky crown on a pre-owned example points to deferred maintenance.
Market read
New H70605731 retails around $795 USD at authorized dealers, and gray market discounts of 15 to 20 percent are common. Pre-owned prices cluster between $550 and $700 depending on condition, with bracelet examples (H70605730 equivalent configurations) commanding a small premium over strap versions. The original 2019 closed-dial limited edition trades above retail when it surfaces, typically $900 to $1,200, because supply is genuinely constrained.
The current open model holds value modestly but does not appreciate; buy it to wear it, not to flip it.
Service expectations
The H-10 (ETA C07.611) carries a manufacturer-recommended service interval of approximately 5 to 7 years under normal use. An independent watchmaker will service this caliber for $200 to $350 USD depending on whether seals and worn components need replacement. The silicon lever and escape wheel are not user-serviceable but are durable and rarely the cause of failures at this age.
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