Hi everyone, For sale is a 1966 Omega Constellation ref. **168.004** with the sleek **hidden crown** case design. It’s powered by the correct **Omega Cal. 561 chronometer** movement. Serviced in **June 2025**. Important note on the dial: it is **original**, but it **likely went through a cleaning attempt** at some point. Please review the close-up photos. **Condition** **Dial:** Original, but shows signs of a past cleaning attempt; spotting/texture visible. **Case:** Original case, likely unpolished, with honest scratches from normal wear. **Crystal:** **New aftermarket replacement**. **Crown:** Hidden crown style; operation as expected. **Movement:** Omega Cal. 561, serviced June 2025. Timegrapher photo included. **Strap/Buckle:** **New aftermarket strap and buckle**. **Specs** * Brand: Omega * Model: Constellation “Hidden Crown” * Reference: 168.004 * Year: 1966 * Movement: Omega Cal. 561 * Case: Stainless steel, **35mm (without crown)** * Crystal: Aftermarket replacement * Strap/Buckle: New aftermarket **Price: $675 USD shipped** Includes insured shipping. **Payment & Terms** Payment via Wise, bank transfer, crypto, or PayPal F&F (G&S is also an option with fee on buyer 's side - +4.5%). No return; photos/description are part of the sale, please ask questions before buying. Happy to share more pics/videos if needed. **Vintage watch note:** Vintage watches are not waterproof. Even if gaskets were replaced during service, these were not built for modern water resistance—please keep it away from water, humidity, and steam.