Omega Seamaster Cosmic 166.036 Steel — Day-Date in C (1969)
Only 1 available
Payment by bank transfer: -3%
Shipping from Europe — taxes and customs duties are the buyer's responsibility outside the EU
Lifetime authenticity guarantee
Serviced movement & 1 year warranty
International shipping
Photo taken on a 17.5 cm wrist
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Omega Seamaster Cosmic steel: the automatic day-date with C-shaped case and sandblasted dial
This Omega watch is a Seamaster Cosmic, reference 166.036, produced in the late 1960s. Unisex, it can be worn just as well by a man as by a woman. Its steel case adopts the famed C-shaped silhouette, this rounded case design with integrated lugs popularized by Gérald Genta, and is distinguished by a monocoque construction: without a separate screw-down case back, the movement is accessed from the front. It measures 35mm (38mm with the crown) for a Lug-to-lug of 40mm and a thickness of 11mm.
The sandblasted silver dial offers a granular texture that captures the light with a subtle shimmer, framed by a contrasting minute track around the periphery. Faceted applied baton indexes rhythm the outer edge, the Ω symbol surmounts the OMEGA and Automatic signatures, and the mention Seamaster Cosmic occupies the lower part. A day-date window is set at 3 o'clock, with the day displayed in English. The faceted baton hands and a slim seconds hand complete the ensemble.
Beating inside is the Omega 752 calibre, an automatic movement with 24 jewels, one of the maison's most accomplished creations in the late 1960s. It manages the quickset day and date display: a simple pull on the crown is enough to correct the date, a function considered highly advanced at the time. The movement of this example has been serviced by our watchmaker. Omega was then at the height of its art in movement-making, which explains the reputation for reliability of this calibre.
On the wrist, this piece wears like a daily watch full of character. The C-shaped case, the sandblasted dial and the day-date complication create an ensemble that is both sporty and dressy, highly representative of Omega's style in the late sixties. It is fitted with black leather, with a Buckle pin buckle, which is not original. The Lug width of 19mm leaves the choice of replacement straps open.
Three points to note
- The 752 calibre is a high-grade automatic with 24 jewels and quickset day-date: one of Omega's most accomplished movements in the late 1960s.
- The case is monocoque: access to the movement is from the front, a particularity best entrusted to a watchmaker familiar with these constructions.
- The sandblasted dial shows a slight speckling and the steel of the case bears traces of wear, consistent with the age of the piece. We prefer to note this rather than embellish it.
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Technical specifications
- Brand: Omega
- Model: Seamaster Cosmic, day-date
- Reference: 166.036
- Estimated year: Circa 1969
- Origin: Switzerland
- Gender: Men's and women's watch (Unisex)
- Movement: Automatic, Omega 752 calibre, 24 jewels
- Functions: Hours, minutes, seconds, day (English) and quickset date, at 3 o'clock
- Case: Monocoque steel case (steel case back, front access), C-shaped / cushion shape
- Dimensions: 35mm (38mm with the crown)
- Lug-to-lug: 40mm
- Thickness: 11mm
- Lug width: 19mm
- Crown: Steel, signed Omega, original
- Dial: Silvered sandblasted dial, contrasting minute track, applied faceted baton hour markers, day-date window at 3 o'clock, original
- Hands: Faceted steel baton hands, central seconds hand, original
- Crystal: Original mineral crystal, very good condition (9/10)
- Bracelet: Black leather, not original
- Buckle: Buckle, not original
Condition and warranty
- Overall condition: Very fine state of preservation. Clean sandblasted dial, functional day-date window, hands intact. The dial shows slight speckling and the stainless steel of the case shows signs of wear, consistent with the age of the piece.
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Movement: Serviced movement, one-year guarantee
- Included: Atelier Victor invoice, protective case
- Not included: Original box and papers
Frequently Asked Questions
What is the Omega Seamaster Cosmic?
The Seamaster Cosmic is a line of de ville and lightweight sports watches produced by Omega in the late 1960s. It is recognized by its C-shaped case, the rounded-case design popularized by Gérald Genta, and comes in simple versions or, as here, with a day-date complication. It is a highly appreciated entry point into vintage Omega automatic watches.
Is the Omega 752 calibre reliable?
Yes, it is one of Omega's great automatics. The 752 is a 24-jewel movement with quick-set day and date, considered very advanced for its era. Omega was then at the height of its watchmaking mastery. Its robustness and the availability of its parts make servicing accessible. The movement in this example has been serviced by our watchmaker and is guaranteed for one year.
How do you set the day and date on this Omega?
The 752 calibre features a quick-set mechanism: by pulling the crown to its outer position and turning it, the day and date advance rapidly. Avoid adjusting these indications between 9 p.m. and 3 a.m., the period during which the calendar mechanism is engaged, in order not to damage it.
What is a monocoque case?
A monocoque case is machined from a single piece, without a separate screw-down case back. The movement is fitted and removed from the front, after removing the Crystal. This construction originally offered better water resistance, but requires you to entrust servicing to a watchmaker familiar with these so-called "front loader" watches.
Is a 35mm case suitable for which wrist?
With a 35mm diameter but a Lug-to-lug of 40mm and a generous C-shaped case, this Cosmic wears larger than its measurements suggest. It fits wrists from 15.5 to 19cm in circumference. It is a versatile and timeless format, now highly sought after again.
Mechanical warranty — 1 year
Each watch is inspected by our watchmakers before shipping. In case of a mechanism malfunction during the first year, we cover the repair.
Authenticity warranty — lifetime
If a watch turns out to be non-authentic, we will take it back and refund you in full. Without time limit.
What is not covered
- Exposure to water or humidity
- Shocks, impacts, or vibrations
- Consumable parts (strap, Crystal, crown, pushers)
- Battery replacement (quartz movements)
- Opening or disassembly of the watch by a third party
- Improper use
The accuracy of vintage watches varies according to the model, movement, and year of production. A request for accuracy improvement deemed within acceptable tolerances cannot be covered by the warranty.
Shipping fees
After-sales service is free. Shipping fees outside the United Arab Emirates remain the responsibility of the customer.
Authentication Process
Each watch is examined by our partner watchmakers before being offered for sale: verification of authenticity, checking the conformity of the components, identification of any modification or replacement of original parts.
If any element has been replaced during the life of the watch (dial, hands, crown, Crystal, strap), we systematically indicate it in the product sheet. You buy knowing the exact history of your piece.
Certificate of Authenticity
Your Atelier Victor invoice serves as a certificate of authenticity: it attests to the origin and conformity of the piece, and is covered by our lifetime authenticity guarantee — if a piece sold by Atelier Victor were found to be non-authentic, it would be fully refunded, with no time limit.
We accept several payment methods:
- Bank card (Visa, Mastercard — American Express not accepted)
- Bank transfer (AED, EUR, USD)
- Cryptocurrency (USDT, USDC)
- PayPal
Other currencies accepted upon request. Exchange fees of approximately 3% may apply.
A 3% discount is granted for any payment by bank transfer starting from €1,000.
Does the strap not suit you? Add the strap of your choice to your order: we will fit it to your watch before shipment, at no fitting charge.
International Shipping
Shipped within 48 to 72 business hours by DHL Express or an equivalent carrier depending on the destination. Delivery in 2 to 6 business days. Each shipment is insured and delivered against signature.
- Free delivery from €1,000 of purchase, as well as on the Jewelry Atelier Victor
- Tracking number sent as soon as the shipment is dispatched
- For certain destinations, delivery may be made to a secure collection point in order to guarantee the integrity of the shipment
Pickup in Dubai
Hand delivery by appointment in Downtown, Dubai. Make an appointment.
Taxes and Customs
The shipping origin is indicated on each product sheet. If the delivery country differs from the shipping country, customs duties and taxes may apply upon receipt, at the buyer's expense. In exceptional situations, customs checks may extend the delivery time, regardless of our wishes and those of the carrier.
For full details, please consult our shipping policy.
FINAL SALES
All sales are final: no return, exchange, or cancellation is accepted after order confirmation. Each piece is authenticated, inspected, and described in detail before being offered for sale.
BEFORE PURCHASE
Our advisors remain at your disposal for any questions and can send you additional photographs or videos upon simple request, by email or on WhatsApp.
NON-CONFORMING ITEM
In the exceptional case of an item that does not match its listing, please notify us within 72 hours: it will be eligible for a refund or an exchange. If the parcel shows damage upon delivery, it should be refused or its opening filmed continuously.
For full details, please consult our return policy.
A piece selected by Atelier Victor
Authenticated, checked, and photographed by us. As all sales are final, our team remains available 7 days a week on WhatsApp to answer your questions, share additional photos or a video of the piece in hand — so that your choice can be made with complete peace of mind.
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