Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 1

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 2

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 3

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 4

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 5

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 6

Thumbnail [WTS] Omega Seamaster Calendar – Cal. 503, Original Dial, 14K Gold-Capped Case 7

Model:	Omega Seamaster	Last Scraped:	Dec. 16, 2025, 8:16 a.m.
Username:	bluewatchmonday4244	Location:	Unknown
Email:	Unknown	Feedback:	No Reviews Found

For sale is a vintage Omega Seamaster Calendar powered by caliber 503. • Movement: Omega automatic cal. 503 • Timekeeping: Running well • Functions: Date change working properly • Dial: Original dial with clear and legible text • Hands: Original • Case: 14K gold-capped • Crown: Original • Case size: 35mm including crown • Strap: Leather strap (not original) • Condition: Honest vintage condition (please refer to photos) Vintage note: This is a vintage watch and is not guaranteed to be water resistant. Moisture or water exposure may cause damage to the movement or case. Why this model is collectible: The Omega Seamaster Calendar with caliber 503 is a well-regarded vintage model from Omega’s golden era. Cal. 503 is known for its reliability and classic automatic design. Examples with original dial, hands, and crown are increasingly harder to find, making this a desirable piece for vintage Omega collectors. Price: $690 USD Shipping: Free economy shipping Ships from Thailand Payment: PayPal Goods & Services Timestamp and detailed photos included.

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Highest:	$8,999	Lowest:	$3
Median:	$2,500.00	Std. Dev:	±$2,088.39

Estimated Private Party Value $990 — $4,250


	Established:	1848
	Website:	https://www.omegawatches.com/
	Country of Origin:	Switzerland

Founded at La Chaux-de-Fonds, Switzerland in 1848 by 23-year-old Louis Brandt who assembled key-wound precision pocket watches from parts supplied by local craftsmen. He travelled throughout Europe selling his watches from Italy to Scandinavia by way of England, his chief market. After Louis Brandt's death in 1879, his two sons Louis-Paul and Cesar, troubled by irregular deliveries of questionable quality, abandoned the unsatisfactory assembly workshop system in favour of in-house manufacturing and total production control. Due to the greater supply of manpower, communications and energy in Bienne, the enterprise moved into a small factory in January 1880, then bought the entire building in December. Two years later the company moved into a converted spinning-factory in the Gurzelen district of Bienne, where headquarters are still situated today. Their first series-produced calibres, Labrador and Gurzelen, as well as, the famous Omega calibre of 1894, would ensure the brand's marketing success.

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