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Omega Speedmaster, Ref. 186.0004

CHF 2,500


Very rare Omega Speedmaster Professional Quartz Ref. 186.0004 LCD Chronograph “moonwatch-case” wristwatch, made circa 1977.  Fine and unusual, water-resistant, quartz wristwatch with LCD digital display with chronograph functions, light, date, day of the week on an integral stainless steel Omega bracelet. Runs great and all functions work as expected, light function works as well. Please take a look at the photos for the condition.

Only produced for 18 months during 1977-78.  In 1979 it was submitted to NASA for testing under the Alaska IV project name. The cal. 1620, developed by Omega and SSIH (later to become SMH). Although it has only basic functions by today’s standards, it is neverthless still a very accurate watch, capable of 0.15 seconds per day, or 5 seconds per month. This is better than a lot of quartz watches available even now. The very good accuracy is due to the high quality quartz resonator used, manufactured in-house by SSIH.

Case. Two-body, polished and brushed, lyre lugs, push-buttons for the chronograph and light functions on the right, the one at 10 is for mode selection, case back embossed with the Seamaster logo, mineral crystal. Dial. Black with LCD digital displays, arrow for day of the week indication. Movement. Omega Cal. 1620/4310 with quartz standardization. Dial, case, movement and bracelet are signed. Diameter 37 mm. Thickness 8 mm. Bracelet fits up to 20.5 cm wrist.

Speedmaster Quartz – expert applications of leading-edge technology to quartz electronic instrumentation. From Omega, a companion piece to the active life of today. A multi-function chronograph watch with 24-hour timing capacity, accuracy to one hundredth of a second, split and lap time functions – you’re obviously looking at a truly functional personal instrument. Ideal companion for many people who, at work or at play, need reliable stopwatch functions and practical advantages which only solid-state technology (i.e. no moving parts) can offer. You can find more information and copy of the manual here:

Watch is in overall great condition, running and ready to wear or gift!


Brand Omega
Model Speedmaster Professional Quartz
Reference Ref. 186.0004
Year 1977
Movement Quartz
Calibre Omega 1620/4310
Case material Stainless Steel
Case size 37 mm
Bracelet original full-sized Omega Ref. 1305/741 bracelet with replaced/non-correct to the bracelet Omega deployment clasp Ref. 1286/249.
Features multi-function LCD chronograph
Box/Papers Original box, no papers


In fully working order. Very good vintage condition, minor surface scratches, scuffs and discoloration through the age. Original full-sized Omega Ref. 1305/741 bracelet with replaced/’non-correct to the bracelet’ Omega deployment clasp Ref. 1286/249. Original box.

Watches are sold as-is, and there is no guarantee of to be waterproof or movement accuracy, due to the nature of vintage watches. Please view all the pictures carefully as they form an integral part of the description. Any defects not mentioned but visible in the pictures will be considered as described.


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