Omega Seamaster Jumbo Ref.166.064 38.5mm 1970

The Omega Seamaster Ref.166.064 represents everything enthusiasts love about Omega’s bold early 1970s design language. Housed in a substantial 38.5mm stainless steel C case, this Jumbo Seamaster offers tremendous wrist presence while retaining the refinement expected of a vintage Omega. The standout feature of this example is its beautiful silver sparkle dial, which catches the light effortlessly and creates a shimmering effect that perfectly complements the sharp faceted indices and classic Seamaster styling. Powering the watch is Omega’s highly regarded Cal. 752 automatic movement with day and date functionality, making this one of the most desirable vintage Seamaster references for collectors seeking a larger and more distinctive everyday watch.

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 Cal.752 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 silver sparkle dial in excellent condition

• Original polished baton hands with tritium lume inserts

• Applied hour indices with matching tritium lume plots

• Original applied Omega logo and crisp original wording

• Day-date window at 3 o’clock with quickset date feature

• Domed acrylic crystal, Omega-signed at center

CASE:

• Distinctive oversized “Jumbo” C-case stainless steel design

• 38.5mm Diameter (excluding crown) / 42.0mm Lug-to-lug / 12.7mm Thickness

• Professionally polished with all sharp edges intact

• Original Omega-signed crown at 3 o’clock

CASEBACK:

• Screwdown caseback with Seamaster Hippocampus medallion

• Professionally polished to perfect vintage condition

• Comes with plastic protective sticker as shown

MOVEMENT:

• Omega Cal.752 – Automatic movement

• 24 Jewels / 50 Hours Power Reserve / 19,800 BPH

• Semi-quickset date function via repeated crown pull operation. Day advances through normal hand rotation.

• Movement freshly serviced and in excellent condition

• Last serviced: June 2026

• Accuracy: XXs/day

STRAP:

• Handmade black crocodile leather strap, 22.0mm lug width

• Aftermarket Omega-style stainless steel buckle

AFTERCARE PACKAGE:

• Comes with a black presentation box + silica gel

• Complimentary PolyWatch crystal polishing kit (for acrylic crystal)

• 6-month warranty (covers non-user damage only)

• Guarantee Certificate with full service details included

• Access to our exclusive post-warranty repair services

• 7-day return policy for peace of mind

SPECIFICS:

Maker: Omega

Model: Seamaster Automatic Day-Date

Year: 1970

Case Material: Stainless Steel

Reference: 166.064

Movement Serial:

Caliber: 752

Diameter: 38.5mm

Lug to lug: 42.0mm

Lug width: 22.0mm

Thickness: 12.7mm

Lume: Tritium

Strap: Handmade leather strap

Box and papers: Montre D’or presentation box and warranty certificate

Accuracy: XXs/day

Movement type: Automatic

Crystal: Omega-signed acrylic crystal

Crown: Original Omega-signed crown

Last service: June 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/SingPost

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: Afghanistan, Belarus, the Central African Republic, Chad, Cuba, the Democratic Republic of the Congo, Eritrea, Iran, Iraq, Lebanon, Libya, North Korea, Oman, Pakistan, Russia, Somalia, South Sudan, Syria, Ukraine and the Crimea, Donetsk, and Luhansk regions of Ukraine.

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.