Omega - Seamaster - 2646 15SC - 501 cal. - Automatic - Mænd - 1958

Omega Seamaster Automatic

Calibre 501

Reference 2846 – 15 SC

Production Year: 1958

Blue Repainted Dial – Stainless Steel Case

Offered for auction is a highly attractive and mechanically important Omega Seamaster Automatic, reference 2846 – 15 SC, powered by the respected Omega Calibre 501, produced in 1958.

This model represents one of the early automatic Seamasters from Omega’s golden 1950s era, featuring the robust 500-series movement family and classic mid-century case proportions.

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Reference & Case Details

Reference: 2846 – 15 SC
Production Year: 1958 (based on calibre period and case reference)
Case Material: Stainless steel
Caseback Type: Screw-back with embossed Seahorse medallion

Inside caseback engravings:

OMEGA WATCH CO
FAB. SUISSE
SWISS MADE
PATENT + 315164
2846
15 SC

Multilingual gasket instruction text:
“Dichtung im Boden einsetzen”
“Loger le joint dans le fond”
“Fit washer in back”
“Ponga la junta en el fondo”

Exterior caseback:
Embossed Seamaster hippocampus logo with “SEAMASTER” and Omega symbol.

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Case

Classic 1950s Omega round case with:
• Symmetrical lyre-style straight lugs
• Polished bezel
• Brushed and polished surfaces
• Screw-down caseback

Case appears visually excellent for its age, with sharp lugs and strong geometry.
There are minor age-related surface marks consistent with vintage use.

No over-polishing is evident; proportions remain well balanced.

Case size (approximate from reference family):
~34 mm excluding crown (standard 1950s Seamaster dress size)

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Movement – Omega Calibre 501

The watch is powered by:

Omega Calibre 501
• Automatic movement
• 20 jewels (engraved “TWENTY 20 JEWELS”)
• Central seconds (15 SC = 15 lignes, sweep center seconds)
• Part of Omega’s legendary 500-series
• Introduced mid-1950s
• Known for durability and smooth winding

Visible engravings on rotor:
OMEGA WATCH CO SWISS
TWENTY 20 JEWELS

The 501 calibre was one of the earliest full-rotor automatic movements from Omega and represents a significant milestone in the brand’s mechanical development.

Timekeeping:
The watch runs well and keeps good time for a vintage timepiece standard.

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Dial

Dial color: Deep blue gradient tone
Finish: Repainted (professionally refinished)

Visible dial text:

Omega logo
OMEGA
AUTOMATIC
Seamaster
SWISS MADE

Applied baton hour markers
Applied Omega logo
Dauphine-style hands
Central sweep seconds hand

Important note:

The dial has been professionally repainted.
It is visually very attractive and clean, with a strong mid-century aesthetic.

There may be minimal age-related or handling marks visible under magnification.
Buyers are strongly advised to carefully examine all photographs.

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Hands
• Dauphine-style hour and minute hands
• Central sweep seconds
• Correct vintage style matching the era

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Crown

Unsigned crown (period style replacement or service crown).

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Strap & Buckle
• New production leather strap
• New production buckle

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Condition Overview
• Original stainless steel case
• Original caseback with Seahorse medallion
• Original Omega Calibre 501 automatic movement
• Professionally repainted dial
• New leather strap and buckle
• Excellent visual condition for a 1958 watch
• Minimal age-related wear possible
• Good timekeeping for vintage standard

All photos are taken in macro detail.
Please study them carefully, as they form an integral part of the description.

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About the Model – Omega Seamaster 2846

The reference 2846 belongs to the early Seamaster generation of the late 1950s.

Seamaster models of this period were:
• Elegant daily wear watches
• Water-resistant (for the era)
• Powered by Omega’s early automatic calibres
• Designed with balanced mid-century proportions

The Calibre 501 within this reference is historically important as part of Omega’s first generation of full-rotor automatic movements that later evolved into the famous 550-series.

This model represents classic 1950s Swiss horology — restrained, elegant, mechanically strong.

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Important Notes
• No water resistance guarantee due to age.
• Vintage watch usage guidelines must be respected.
• Customs duties, import taxes, VAT, stamp duties, and similar charges are the buyer’s responsibility.
• Please examine all photographs carefully before bidding.

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Shipping

The watch will be shipped via FedEx, UPS, or DHL for secure and fast international delivery.

Before shipment:
• Detailed photos will be taken
• A working video will be recorded
• Professional packaging will be provided

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This 1958 Omega Seamaster 2846 with Calibre 501 represents an important chapter in Omega’s mechanical heritage and offers timeless 1950s elegance combined with robust Swiss engineering.

Please review all images carefully before placing your bid.