Omega Seamaster Calendar – Cal. 503 (c.1958) – Ref. 2849 SC 🗓️

A beautifully honest 1958 Omega Seamaster Calendar, housing the Calibre 503 automatic movement. Unlike later Seamasters, this reference still carries the smooth back with “Seamaster” and “Waterproof” text only—produced before the Seahorse logo was introduced.

This particular example features an untouched, evenly patinated dial, which gives it that warm vintage character collectors love. All original, never refinished. The larger “chunky” flat-edged crown design makes winding far easier than the smaller versions seen on other Seamasters of the time.

Paired with a beautiful green deployment leather strap for timeless appeal. Priced at £950.

Key Details

• Model: Omega Seamaster Calendar

• Reference: 2849 SC (inside caseback)

• Year: 1958

• Movement: Omega Cal. 503 automatic, 20 jewels

• Case: Stainless steel, ~34mm (excl. crown)

• Crystal: Acrylic (Omega style)

• Dial: Original silver/cream, untouched with even patina, applied indices, date at 3

• Lugs: 18mm – paired with black leather strap (strap options available on request)

• Caseback: Smooth stainless steel back with “Seamaster” and “Waterproof” engraving (pre-Seahorse logo era)

• Papers/Box: ❌ No original papers, ✅ supplied with a vintage Omega red presentation box

Condition – vintage honesty 👀

• Dial: All-original with an evenly aged patina—no redial, no restoration.

• Hands/Markers: Correct and original, showing light natural ageing.

• Case: Vintage wear consistent with age; retains its edges, not over-polished.

• Crystal: Clean, light vintage marks.

• Movement: Cal. 503 tested and running well. Date function working correctly.

• Water resistance: Not pressure-tested; avoid water exposure, as with all true vintage watches.

What’s Included

• Omega Seamaster Calendar ref. 2849 SC with Cal. 503

• Original red Omega presentation box

Why Buy from Fine Watch Club? 💼

• 🔧 12-Month Mechanical Warranty (vintage-appropriate coverage)

• 📦 Free UK next-day insured delivery (Royal Mail Special Delivery)

• 🌍 Worldwide shipping via DHL/FedEx (fully insured)

• 🔎 Authenticity guaranteed – movement and case correctly signed; transparent movement photos supplied

• 🛠️ In-house watchmaker support & lifetime aftercare advice

• 🏪 Viewings by appointment (Norwich, UK)

• ♻️ Part-exchange welcome – contact us for a tailored offer

Shipping & Returns 🚚↩️

• UK: Next-day insured delivery included.

• International: Insured DHL/FedEx options at checkout. Import duties may apply.

• Returns: 14-day no-quibble returns policy. If it’s not for you, simply return in original condition for a refund.

Collector’s Note 🧠

• The Calendar series is much rarer than the standard Seamaster Date, with the Cal. 503 ensuring smooth automatic operation.

• The smooth caseback (engraved only with “Seamaster” and “Waterproof”) marks it as an early transitional model—produced just before the Seahorse medallion became standard in the 1960s.

• Its original patinated dial is what seasoned collectors prize—proof of authenticity and charm.

Price: £995
For enquiries or purchases, please contact us:

Fine Watch Club
📧 sales@finewatchclub.co.uk
📞 +44 (0)1603 850 278
📍 Norwich, United Kingdom