{"product_id":"1975-mariner-10-venus-mercury-10-pasadena-ca-first-day-cover-1","title":"1975 Mariner 10 Venus Mercury 10¢ Pasadena, CA First Day Cover","description":"\u003cp\u003eThis Fleetwood official First Day Cover features the 10¢ Mariner 10 Venus\/Mercury stamp issued April 4, 1975, in Pasadena, California. The colorful cachet depicts the Mariner spacecraft and celebrates the unmanned exploration program.\u003c\/p\u003e\u003cp\u003eMariner 10 holds a unique place in space history as the first spacecraft to use a gravity-assist trajectory, swinging past Venus in order to reach Mercury. Launched in 1973, it became the first probe to visit the innermost planet and returned the only close-up images of Mercury obtained in the 20th century.\u003c\/p\u003e\u003cp\u003eThe cachet artwork highlights the innovative mission concept and carries the Fleetwood imprint, a hallmark of quality among 1970s U.S. First Day Covers. The Pasadena postmark ties the cover directly to the Jet Propulsion Laboratory, which managed the mission.\u003c\/p\u003e\u003cp\u003eA fine addition to any space or NASA topical collection, this well-preserved FDC displays crisp graphics and a clear first-day cancel, making it both attractive for display and meaningful for postal-history enthusiasts.\u003c\/p\u003e","brand":"Maple Springs","offers":[{"title":"Default Title","offer_id":51394934472868,"sku":null,"price":4.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0580\/4713\/5908\/files\/20260702111329.jpg?v=1783043558","url":"https:\/\/fdc-vault.com\/products\/1975-mariner-10-venus-mercury-10-pasadena-ca-first-day-cover-1","provider":"Maple Springs - FDC Vault","version":"1.0","type":"link"}