Jaeger-LeCoultre Memovox Deep Sea Alarm Wristshot
Wristshot

Jaeger-LeCoultre Memovox Deep Sea Alarm Wristshot

By Larrykelley11 · Jan 2, 2026 · 20 replies
Larrykelley11
WPS member · Jaeger-LeCoultre forum
20 replies364 views1 photos
f 𝕏 in 💬 🔗

Larrykelley11's post featuring his Jaeger-LeCoultre Memovox Deep Sea Alarm (DSA) on a custom strap offers a glimpse into the personal connection collectors have with their timepieces. This thread highlights how a specific watch, even with its historical significance, becomes a canvas for individual expression through strap choices. It underscores the enduring appeal of JLC's iconic diver and the subtle humor often found within the collecting community.

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JLC DSA on custom strap


About the Jaeger-LeCoultre Deep Sea Alarm Ref. E 551

The Jaeger-LeCoultre Deep Sea Alarm, specifically the US-market LeCoultre E 551 variant seen here, holds a significant place in horological history as one of the earliest purpose-built dive watches to incorporate an alarm function. Introduced in 1959, it emerged during a pivotal era for professional diving, offering a crucial audible alert for divers to monitor elapsed time or decompression stops. This model represents a unique fusion of Jaeger-LeCoultre's renowned alarm watch expertise, inherited from its Memovox lineage, with the robust requirements of underwater exploration.

Technically, the Deep Sea Alarm is powered by the automatic Caliber 815, a sophisticated movement for its time, enabling both timekeeping and the distinctive alarm complication. Its design language is unequivocally functional, featuring a matte black dial with prominent luminous hour markers and hands, ensuring legibility in low-light conditions. The bi-directional rotating bezel, marked with a 60-minute dive scale and triangular markers, allowed divers to track immersion times. The dual crowns—one for winding and setting the time, the other for the alarm—underscore its dual-purpose engineering.

Today, the vintage Deep Sea Alarm is a highly coveted piece among collectors, celebrated for its rarity, innovative design, and historical significance. The E 551, with its "LeCoultre" signature, is particularly sought after by those appreciating the nuances of market-specific branding. Its status as a pioneering dive instrument, combined with Jaeger-LeCoultre's horological pedigree, ensures its enduring appeal and strong position in the vintage watch market, often commanding premium values.

Specifications

Case
steel
Diameter
40mm
Dial
black

Key Points from the Discussion

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The Discussion
KC
KCLQMULKU
Jan 2, 2026

A very cool LeCoultre!!!

AQ
Aquaracer1
Jan 2, 2026

Really easy on the eyes 👌🏻

KM
KMII
Jan 3, 2026

Where one should only wear DSAs on the first of the month? 🤷🏻‍♂️ Certainly looks good irrespective of the day 😁

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