Omega Speedmaster Moonwatch Professional 42mm Sapphire Crystal 311.
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Reference Number: 311.

Omega Speedmaster Moonwatch Professional 42mm Sapphire Crystal 311.

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Omega Speedmaster Moonwatch Professional 42mm 311. Watch Review

Omega's Speedmaster watches are some of the most iconic watches introduced in the watchmaking industry. These models are one of Omega's most important models since they replicate the watch worn on the moon.

There are several models of the Speedmaster model. Over the years, several watches were released by Omega under the Speedmaster model. The Omega Moonwatch Professional 42mm 311., created in 2014, became one of its most popular watches due to its sapphire sandwich appearance.

Omega Moonwatch Professional 42mm 311.

The main reason why the Omega Moonwatch Professional 42mm 311. gained its popularity was that it is one of the most classic variants from the Speedmaster collection. It is also the model that closely resembles the one worn to the moon.

Omega Moonwatch Professional 42mm 311. had several reference number changes over the years, but the design has been mostly the same, and so has the production.


The Omega Moonwatch Professional 42mm 311. is made from stainless steel. The dial of the watch is black and has white printed text on it. The case has a diameter of 42mm and has a thickness of 14mm, which gives the watch a more professional and fuller appearance. The short lugs make the watch look like it is 40mm in diameters when worn.

The stainless-steel bracelet on the watch has a double release clasp, which allows the wearer to feel comfortable while wearing the watch. The watch has a robust feel and is quite sturdy; thus, it won’t break easily, especially since it is made of stainless steel.

The Omega Moonwatch Professional 42mm 311. is not automatic, and this is because the watch that it is based on was also not automatic. There is no gravity in space, which would have caused issues with an automatic watch's workings. Thus, a manual-wound movement was a must. This watch was created with the thought that it would resemble the watch worn on the moon, so the automatic feature was removed.

The Omega Moonwatch Professional 42mm 311. gets its nickname of “sapphire sandwich” because of the see-through case back and its sapphire crystal. The sapphire crystal is domed and has the anti-reflective treatment done on the inside. The anti-reflective treatment allows the user's eyes to feel less strained as more light enters their eyes. The sapphire crystal is also scratch-resistant, so you won't have to worry about removing the watch while doing some form of heavy load work.


The Omega Moonwatch Professional 42mm 311. has a manual wind chronograph, but the see-through case back allows you to admire all the details of the sophisticated and stunning 1863 chronograph movements. The same chronograph movement was used in the model worn on the moon. The chronograph movement is rhodium plated and has a circular graining. It has embellishments of Cotes de-Geneve, and the levers and the bridges have well-polished edges.

The watch has 18 jewels in it and a shock absorber device. The shock absorber device allows for your watch's delicate pivots to be protected from any form of pressure. The watch also features a straight-line lever escapement, which enables the watch to oscillate.

The watch's caliber has a monometallic balance, an index regulator, and a self-compensating flat balance spring. All of these features of the caliber allow it to beat at a frequency of 3 Hz. Each edge of this stunning sapphire sandwich has proper finishing, and every end of it is perfectly polished.

Water Resistance

The watch was designed for use in space, and because of this, its water resistance is not as good as other Omega watches. The water resistance for this watch goes up to 50 meters (5 bars / 167 feet).


Omega is known for creating a timeless piece. Its Omega Moonwatch Professional 42mm 311. is one of the best examples of its efforts to keep history alive even in the modern era.

Watch Features

Case BackExhibition Case Back
Case Width42mm
CrystalSapphire Crystal
Dial ColorBlack
Dial MarkersLuminous
FunctionsHours, Minutes, Seconds, Chronograph, Tachymeter Scale
MovementCaliber Omega 1863 Famous manual-winding chronograph movement that was used on the Moon. Rhodium-plated finish.
Water Resistance50M
Bracelet StrapSteel
Clasp TypeFolding
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