Omega Seamaster DeVille Ref.166.020 Cal.565 34.5mm 1966

A stunning example of the Seamaster Deville from Omega’s transitional era in the mid-’60s. This Ref.166.020 features a 34.5mm monocoque stainless steel case, forged out of a single piece of steel to achieve a greater level of water resistance for its time. Not to mention this particular reference comes with a rare set of onyx stone inserts across the hour markers. A subtle blend of mid-century elegance and technical ingenuity, this watch carries the legacy of Omega’s early Deville line, one that remains in production today.

In addition, this timepiece comes freshly serviced with all parts laid out by our professional watchmaker for all to see in the images above. Little to no other dealers do this and it’s a testament to full transparency here at Montre D’or. With the iconic copper toned Cal.562 movement inside running excellently as shown in the timegrapher reading above, just like it was when it left the factory nearly half a century ago.

DIAL:

• Original sleek silver satin dial with small marks of patina

• Sleek pencil shaped hands with black inserts

• Applied faceted hour indices with matching black Onyx stone inserts and matching tritium lume

• Applied Omega logo and crisp “Seamaster DeVille” wording

• Original domed acrylic crystal, Omega-signed at center

CASE:

• Classic round monocoque stainless steel case in polished finish

• 34.5mm diameter (excluding crown) / 40.5mm lug-to-lug / 10.0mm thickness

• Professionally polished to excellent condition, keeping all sharp edges

• Original Omega-signed thin scallop crown at 3 o’clock

• Stainless steel caseback with embossed Seamaster hippocampus logo

MOVEMENT:

• Omega Caliber 562 – Automatic winding with quickset date (Set by turning time between 9pm and 12am)

• 24 jewels / 44hour power reserve / 19,800 vph

• Movement freshly serviced and in excellent condition

• Last serviced: February 2026

• Accuracy: +2.0s/day

STRAP:

• Handmade Crocodile Leather Strap, 18mm lug width

• Aftermarket Omega-signed stainless steel buckle

AFTERCARE PACKAGE:

• Comes with a black presentation box + silica gel

• Free PolyWatch Acrylic Crystal Polishing kit

• Warranty/Service history card for easy future sale

• 6-Month warranty (non-user damage)

• Exclusive Post-warranty service access

• 7-day return policy for peace of mind

SPECIFICS:

Maker: Omega

Model: Seamaster DeVille

Reference: 166.020

Case Material: Stainless Steel

Year: 1966

Serial Number: 24781534

Caliber: Omega Cal.562

Movement Type: Automatic

Power Reserve: 44 Hours

Accuracy: +2.0s/day

Diameter: 34.5mm

Lug to Lug: 40.5mm

Thickness: 10.0mm

Lume: tritium

Strap: Handmade crocodile Leather

Box and papers: NIL

Crystal: Domed acrylic (Omega-signed)

Crown: Original Omega-signed crown

Last Service: February 2026

Free express tracked shipping with signature upon delivery. Delivery within Singapore in 1-2 working days. International shipping may take 2–12 working days depending on destination and will be shipped via FedEx/UPS/Aramex.

Do note respective custom duties might apply which includes the recent US tariffs and are the buyer's responsibility.

Do note that for US bound shipments the PolyWatch polishing kit will not be included in order to mitigate customs delay due to new customs requirements

Countries that we do not ship to: Algeria, Nepal, Pakistan, Russia, Vietnam, Iran

This is a vintage timepiece and water resistance is not guaranteed. Please avoid contact with water or moisture. Store the watch with dry tissue or silica gel to preserve its condition. We are not liable for water damage post-purchase.