#TBT – Omega Cosmic Moonphase

#TBT – Omega Cosmic Moonphase

When I began to investigate vintage Omega watches I was immediately snared by their chronographs. As far as I might be concerned, a chronograph is one of the coolest and most usable highlights a watch could have. This was the explanation – or maybe the way that my first Omega with a complication was a type 1040 chronograph. Still right up ’til the present time I hold those watches precious to me. Along these lines, as I stayed into the brilliant universe of vintage Omegas I went over a model line that, as far as I might be concerned, was the exemplification of vintage Omega dress watches, and there were many. It was the Omega Cosmic line. Presently, I’m not discussing the last part of the 60’s mid 70’s pad case (Seamaster) Cosmics and Cosmic 2000s. In spite of the fact that I had a couple of those as well. I’m alluding to the triple schedule moonphase variants from the last part of the 1940’s. Vintage Omega moonphase watches like the 2486-2 we’ll discuss today.

Omega Cosmic


Some call it “moon stage”, others express “moonphase”. Since Omega utilizes the last term, I’ll go with that as well. Moonphase is a complication that is genuinely pointless nowadays. Be that as it may, it associates us to the earliest reference point of time estimating. The pattern of the Moon is roughly 29.5 days. This implies that from new moon (when the Moon is scarcely obvious in the sky) to full Moon (when the entire circle is enlightened) back to the new moon again our dark space explorer landing station needs 29 days, 12 hours and 44 minutes (and 2,9 seconds) to finish up. This cycle was perceived millennia prior and it turned into an approach to quantify the progression of time. One could admire the Moon and tell on the off chance that it was the start or the finish of a month (all things considered, this +-29.5-day time frame). Over the long run a couple of days were added or removed and the (Gregorian) schedule we realize today was born.

1947 – 1956

The Cosmic assortment was presented in 1947 and Omega had it underway until 1956. At the time it was quite possibly the best watches the brand could offer. The Omega Cosmic watches came in two sizes (34-35mm and 37.5mm) in four distinctive case materials. You had steel, gold filled, gold-covered, and strong gold variations (14K and 18K). To the extent my examination goes, Omega delivered six references: five in the last part of the 1940’s and one in the mid 1950’s. The reference 2606, 2471 and 2473 were all little (35mm) watches. The reference 2485 and 2486 were bigger with 37.5mm. In 1951, the last reference of this assortment came to presence as the reference 3944. It was additionally more modest in size however had an unmistakable square case, instead of round like all the others previously. Every one of them went ahead a cowhide tie with coordinating buckles.

Caliber 381

Some say that the development inside the Omega Cosmic moonphase watches were in-house types. This isn’t correct. Indeed, in all honesty, that development has a straight ancestry to the Moonwatch . Allow me to clarify; Omega just utilized one kind of development in their Cosmic watches. Omega considers it the type 381 in their information base. Notwithstanding, that development just got its name changed to type 381 around 1948 (some say 1949). Heretofore it was known as the 27 DL (PC AM). Moreover, the official name of the new type was 381 27 DL PC AM 17 P. DL represents triple date and moonphase, PC alludes to the safeguard and AM is for antimagnetic. 27 denotes the development line where the number comes from the size of the development at 27mm in distance across and 5.25mm in thickness. It has 17 gems and 18.000 Vph.

Omega utilized this development, they didn’t create it. Lémania did. Recall that at the time Omega, Tissot and Lémania had already shaped the SSHI (Société Suisse pour l’Industrie Horlogère – Swiss Association for the Watchmaking Industry) the archetype of the Swatch Group. Lémania conveyed the developments that Omega and Tissot utilized in their watches. Lémania acquired a market while the brands got developments by probably the best producer of the time. It was a mutually advantageous arrangement for everybody. The 27 DL and the 27 CHRO ( that later turned into the 321 ) didn’t just come from a similar development maker yet additionally shared various comparative specialized highlights. Additionally, at Lémania Albert Piguet was in control for the advancement of the two developments. Hence the 381 isn’t just a remarkable development in the Omega Cosmic watches yet one with a magnificent story to tell.


The most concerning issue one may come across regarding the Omega Cosmic moonphase is the dial condition. As you can find in the photos mine additionally seen some more promising times however I actually think of it as truly useful for its age. Also that the full scale photographs draw out each little imperfection that may be covered up to the unaided eyes. In any case, we can concede to that the dials on numerous models, paying little heed to what reference we are taking a gander at, are a long way from immaculate nowadays. This could be the explanation behind the watch’s age or the way that they were not water safe, so water could advance into the case at first annihilating the development or potentially the dial. A great deal of redials are available and one must be very much prepared to have the option to recognize the first ones. It’s certainly feasible however but rather takes practice.

The design is basic. You have the moonphase opening at 6 o’clock position. That additionally fills in as the sub second dial where the second’s hand runs over the moonphase plate. The day and month windows are under the name and logo at 12 o’clock. They are close to one another. The date is throughout the edge of the dial with a pointer hand showing the right number. Excellent enthusiastic tones and shapes describe the Omega Cosmic moonphase dials. The files are often arched and painted, the dates have unexpected tones in comparison to the lists and again unique in relation to the numerals. The hands could be alpha or leaf, the files could be loaf or spike with smooth or slanted surfaces. While most of the dials have no lume in some uncommon cases you can discover one with radium-covered numerals and additionally indexes.

Numbers, costs and more

According to certain sources, Omega made generally 50.000 Cosmic moonphase watches in a course of 9 years. Anyway because of various elements they are not very continuous these days in great, unique condition. You can discover them on the standard online watch stage often with redials. The models that are in acceptable unique condition can bring a significant cost particularly in the event that they are strong gold or steel and from the bigger 37mm reference (2485 or 2486). For reasons unknown, a significant number of the Omega Cosmic moonphase watches I discovered are coming from South America only. Despite the fact that Omega promoted the brand intensely there, particularly in the 1940’s and 1950’s, their weighty presence is charming, no doubt. The Omega Cosmic region is still genuinely unfamiliar so in the event that you have data on these watches if it’s not too much trouble, send us a mail and I’ll refresh the article accordingly.

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