Introduction Offered here is a vintage CITIZEN Cosmotron Electronic Ref. 7803-790103, believed to have been manufactured in August 1974. This attractive Japanese vintage watch features a silver-tone dial, day-date display, stainless-steel case, and its original CITIZEN stainless-steel bracelet with signed clasp. The Cosmotron is particularly interesting because it comes from a brief and important period in watchmaking history, when electronic technology was developing rapidly just before quartz watches became dominant. Historical & Collector Value Citizen was one of the important pioneers of electronic wristwatch technology in Japan. The Cosmotron family represents the transitional stage between conventional mechanical watches and the quartz revolution. Rather than using a traditional mainspring-driven mechanical movement, the Cosmotron employs an electronically powered balance-wheel system. Citizen introduced the Cosmotron Special in 1972, and only one year later, in 1973, the company introduced its first quartz wristwatch. This places watches such as the Calibre 7803 Cosmotron directly within one of the most technologically significant periods in Citizen’s history. For collectors, these watches are interesting not simply as vintage timepieces, but as surviving examples of a relatively short-lived electronic technology that was soon superseded by quartz. Based on the case-back serial number 40800126 and the commonly used vintage Citizen serial-number dating method, this watch is believed to have been manufactured in August 1974. The exact production date cannot be guaranteed. The presence of the original CITIZEN bracelet and signed clasp further enhances the appeal of this example as a vintage collector’s piece. Specifications Brand: CITIZEN Model: Cosmotron Electronic Reference: 7803-790103 Case-back reference: 7803-790103 TA Movement: CITIZEN Electronic Cal. 7803 Estimated production: August 1974 Serial number: 40800126 Case material: Stainless steel Bracelet: Original CITIZEN stainless-steel bracelet Clasp: Signed CITIZEN clasp Case diameter: Approx. 36.5 mm Case thickness: Approx. 12.3 mm Lug width: Approx. 18 mm Bracelet width: Approx. 17.7 mm Wrist circumference: Approx. 19 cm Weight: Approx. 93 g Functions: Hours, minutes, seconds, day and date Seller inventory number: 26H007 Accessories: Watch only; no box or papers Condition This is an approximately 50-year-old vintage watch and shows normal signs of age and previous use. The stainless-steel case and bracelet have scratches, small marks and general wear consistent with a vintage watch of this period. The silver-tone dial retains an attractive vintage appearance, with applied baton hour markers and clearly visible CITIZEN ELECTRONIC and COSMOTRON signatures. The original bracelet also shows signs of previous use, including scratches and marks on the clasp. Please examine all photographs carefully, as they form an important part of the condition description and show the actual watch being offered. Service History All functions have been checked and confirmed operational. A new battery has been installed, and the watch is currently running properly. The day and date functions have also been checked. Due to the age and vintage nature of the watch, future accuracy cannot be guaranteed to modern quartz-watch standards. Although the case back is marked “Water Resistant,” the water resistance has not been tested. Therefore, exposure to water is not recommended. Shipping & Customs The watch will be carefully packed for safe international shipment. Any customs duties, VAT, import taxes, clearance fees or other charges imposed by the destination country are the responsibility of the buyer and are not included in the purchase price. IMPORTANT – Customs & Import Taxes If customs duties / VAT are not paid by the buyer, the parcel cannot be delivered and will be returned. In such cases, the sale will not be refunded. Please make sure to pay all customs charges promptly.