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.