CITIZEN wristwatch with a green dial and automatic winding function. Working condition. Vintage item. - Brand: CITIZEN - Color: Green - Function: Automatic winding - Day display: FRI - Material: Stainless steel - Water resistance: Waterproof Thank you for viewing. The following information was researched. Please use it as a reference. Product name: Citizen Cosmo Star V2 (CITIZEN COSMO STAR V2) Model number: 4-661109 Y Case number: GN-4-S 2. Internal model (movement) and mechanism Caliber: Cal. 6600 (number within the square frame on the back cover) Mechanism: Automatic winding (Automatic) Equipped with Cal. 66 series. Features: * Day-date (day and date) display at the 3 o'clock position. The green gradient dial, typical of Citizen from this era, is very vivid. 3. Year of sale and price at the time Manufacturing year: Manufactured in September 1973 From the serial number "309xxxx" on the back cover, the first "3" indicates 1973, and "09" indicates September manufacturing. Price at the time: In the early 1970s, it was sold for around 12,000 yen to 15,000 yen. At that time, the starting salary for a university graduate was about 60,000 yen to 70,000 yen, so it was a solid, mid-range practical watch. After winning the bid, no claims and no returns are accepted.