Today's offering showcases this classic and uncommonly large Omega Seamaster with extra large "Seamonster" hypocampus logo the back.

A "jumbo" Seeamaster, it measures approximately 36mm in diameter without the crown by 43mm long, about the size of Rolex Datejust.

Powering the watch is Omega's top-tier caliber 501 movement, one of the superior 500's series movements used before Omega began trying to reduce their costs. It has 20 jewels and is one of the finest mass-produced automatic movements from era.

It has all of its original parts and has just finished a true expertly done restoration. It presents in gorgeous condition - our photos couldn't do it justice.

Its case presents as mint with light signs of polishing to the back and a some aging hidden inside the engine bay as is common with these. On the wrist it presents as mint.

Its original Omega dial has been meticulously refinished - the printing could pass as Omega factory done to the naked eye.

Despite what the photos seem to suggest, it is a true rich royal blue color.

As part of the restoration, the very fine caliber 501 movement with fine swans neck regulation has been freshly expertly overhauled by a Master Watchmakers. It is running extremely strong and true, keeping time on par with a brand new Omega in our testing recording position.

For the finishing touch, it has been equipped with a new aftermarket leather strap and aftermarket Omega style buckle making it ready for immediate use.

Included with the purchase is a one-year warranty on the movement and its function, a custom printed Connoisseur of Time Certificate of Authenticity, and a new timing certificate attesting to the watch's performance.

Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an extremely experienced team of four Master Watchmakers all of whom each have over thirty-five years of experience and a large number of parts. One used to be the watchmaker for an authorized Rolex dealership and was given special training by Rolex at their Beverly Hills Service Center.

An uncommon six and a half decade old "jumbo" Seamaster that looks like new on the wrist!

The Seamaster:

Omega is perhaps best known by watch connoisseurs for its Seamaster line of dive watches. Introduced in 1948, they have been were embraced by water sports enthusiasts and often marry a striking look with a high performance movement.

Manufacturer: Omega
Country of origin: Switzerland
Serial no.: 16,671,507
Year built: c. 1958
Model: Ref. 2856 / 2857 5 SC, Seamaster
Functions: Hours, Minutes, Automatic, Date, Sweep Seconds
Designed for: Men
Case material: Stainless steel
Case markings (outside): Seamaster with hypocampus emblem
Case markings (inside): Omega Watch Co., Acier Inoxydable, Swiss made, 166.011
Case condition: Presents as mint with light signs of polishing to the back and a some aging hidden inside the engine bay as is common with these. On the wrist it presents as mint.
Dimensions: 36mm wide (excluding crown), 43mm long lug tip-to-tip
Dial: Royal blue, crosshair design, signed Omega Seamaster, applied faceted steel baton indexes, expertly refinished. Despite what the photos seem to suggest, it is a true rich royal blue color.
Hands: Original, steel dauphines. Please inquire if you would like the white removed from the seconds hand.
Movement type: Cal. 501, copper colored, self-winding, 20 jewels, lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring, micrometer regulator
Movement markings: Omega Watch Co. Swiss, Twenty Jewels, 501
Jewels: 20 rubies
Beat frequency: 19,800 BPH
Band: Leather, fully stitched, padded, brand new and unworn with aftermarket buckle done in an Omega style. We also stock lizard and a variety of other straps in various prints, skins, and colors. Please ask us if you're interested.
Width between lugs: 18mm
Crystal type: Acrylic, original, signed Omega, excellent condition
Serviced: Yes, freshly serviced by a Master Watchmaker.
Timing: Timed to precision on a state-of-the-art computerized system. It is running very strong and true, keeping time on par with a new Omega in our testing recording position. Your watch is important to us, and we will take care of it for its lifetime. We provide the best after sale care in the business with an extremely experienced team of four Master Watchmakers all of whom each have over thirty-five years of experience and a large number of parts. One used to be the watchmaker for an authorized Rolex dealership and was given special training by Rolex at their Beverly Hills Service Center.
Warranty: 1-year international warranty. Please email concierge@cotwatches.com for details.
Box/Papers: BOX - Connoisseur of Time watch presentation box; PAPERS - Custom printed Connoisseur of Time Certificate of Authenticity; New timing certificate
Returns: 7 days full refund. 100% satisfaction guarantee

We offer a 100% satisfaction guarantee for all of our watches. If you are in any way unsatisfied with the watch we will fully refund the purchase price anytime within 7 days after the watch has been received. Our goal is to exceed our client's expectations throughout the buying experience.

All watches are packaged carefully and mailed double boxed in specially constructed, reinforced shipping boxes designed for high value items. All watches are sent fully insured with signature required. Most of our domestic shipping is done through FedEx. At times we will also use USPS Express Mail, and we can accommodate most requests for your preferred carrier. International shipments are sent USPS International Express Mail or FedEx.

The purchase price will be the declared value of the merchandise on any required customs forms. The payment of all customs duties, tariffs, and taxes are the responsibility of the buyer.

Also note that water resistance of vintage watches can no longer be guaranteed and is not covered under the watch's warranty. We do not recommend getting a vintage watch wet, even one that was originally designed to be waterproof.

To get an idea of how this watch will look on the wrist, please use the Watch Sizing Guide

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