Jaeger-LeCoultre
Polaris Mariner Memovox
Q903818J
The alarm diver reborn — Polaris Mariner Memovox in 42 mm steel.
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Overview
The Jaeger-LeCoultre Polaris Mariner Memovox (ref. Q903818J) revives one of the most distinctive concepts in dive-watch history: a mechanical alarm complication purpose-built for underwater use. Housed in a 42 mm stainless steel case, it carries Calibre 956 and presents a blue gradient dial paired with a dedicated alarm disc. The reference sits within the contemporary Polaris collection, which draws its design language directly from the brand's mid-twentieth-century sport watches.
History
Jaeger-LeCoultre first introduced the Memovox alarm complication in the 1950s, and the Polaris Mariner variant extended that idea into a purpose-designed diver with an audible alarm intended to signal decompression stops. The Q903818J belongs to the modern Polaris revival that Jaeger-LeCoultre launched in the late 2010s, reinterpreting the archival Mariner Memovox for contemporary collectors. Introduced in 2023, the reference updates the formula with Calibre 956 while preserving the tri-register layout and rotating alarm disc that define the lineage.
Notable points
- Calibre 956 is an in-house automatic movement incorporating a mechanical alarm complication — a technically demanding combination rarely found in dive watches.
- The blue gradient dial is layered with a separate alarm disc, giving the watch its characteristic multi-register appearance inherited from the original Mariner Memovox.
- At 42 mm in stainless steel, the case balances wearability with the robust proportions expected of a tool-oriented diver.
- The Polaris Mariner Memovox lineage traces back to the 1960s, making it one of the earliest purpose-built alarm divers from a major Swiss manufacture.
- The alarm function was originally conceived to alert divers to decompression stop times, blending horological complication with genuine utility.
Specifications
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