1966 Omega (Swiss) Seamaster Cosmic Ref. 166.023 Watch – Cal. 565 SN# 24858324


Out of stock

From 1966, a lovely Omega Seamaster Cosmic Ref. 166.023 dress watch that has been professionally inspected by Localtime.

The steel case (33mm or 35mm counting the original and logoed crown at 3h) has been lightly cleaned and the Omega date automatic Cal. 565 movement oiled and regulated. A stunning watch that oozes class whichever angle you look at it from, this classic dress watch comes on one of my own ‘racing-style’ leather straps that I think compliments the silver dial, hands and applied indices, very nicely. These straps come in 5 colours and 4 sizes (18-20-22-24mm) and have quickly become some of my favourites and can be purchased separately here: 132860199083. I have included many photos of this beautiful timepiece, including a couple from the service bench when the watch was open.

As with all the watches that are handled by Localtime, the listed price includes a written 6-month written warranty from the date of purchase. Feel free to contact me for whatever questions you have.

Extra: Try my Localtime Verona calf buffalo leather straps: I have found them to be very comfortable and a great match especially for dress watches and chronographs that will combine well with this style of straps. They come in 5 sizes (16-18-20-22-24mm), 2 lengths (standard: 90/115mm & extra long: 95/1255mm) and 4 colours (black, blue, brown and dark brown). Each strap also comes with 2 buckles; one stainless steel and one gold-plated. They have two keepers, one of them is fixed and the other one is floating, for a better fit and comfort. A good quality pair of spring bars is included with each strap. You can see them in the last photo here and/or purchase them separately under eBay item 132941096192. Feel free to contact me for whatever questions you might have.

Important Note: Sometimes I am asked what I exactly mean with ‘professionally inspected by Localtime’. Here is my theory on vintage watches: as a purveyor of vintage watches, my effort is to always do only what is needed to the watch. I do not buy ‘junk’ watches to resell. I am choosy with my purchases and always sell watches that are, to my knowledge, authentic and in good condition. I first inspect the watch, both visually (cosmetically) and then mechanically. If I judge that the watch is not yet in need of a full service then I do not put the watch through a service which, by the way, entails a lot of risks too. Instead, I give it what I call my ‘Spa’ treatment which will include a cleaning, changing of gaskets, oiling, lubricating and mechanical testing. If the plexi is heavily scratched or discoloured and it can not be cleaned, I change it. If the crown is wrong or worn, I also change it. Now, if the watch is in need of a full service, then my ‘professionally inspected’ description becomes ‘professionally serviced’. In both cases, I include a written warrantee with my buy it now price and I always describe what I have changed, if anything, on the watch.

Important Note On Straps/BraceletsThe straps I use on my watches [leather, canvas, suede, rubber] are always brand new, unless otherwise mentioned and, in most cases, I also sell them separately in my store, in different colours and sizes. In the case of metal bracelets, if the watch is NOS, the bracelet is also unused. If the watch is pre-owned with its original bracelet, then the bracelet is also pre-owned, unless otherwise mentioned. Either way, if in doubt, please ask.


OMEGA (Swiss)

Production Period

1966 (SN#24858324)


Seamaster Cosmic Ref. 166.023


Time, Date at 3h




Omega Cal. 565

Case Material

Stainless Steel

Case Back

Monobloc Stainless Steel

Case Size

33mm case, 35mm including crown at 3h

Lug Width



Pre-Owned & Working With Warrantee

Last Known Service

Inspected by Localtime – April 2019


FREE (Express & Fully Insured)


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