{"product_id":"crystal-cave-black-hills-sd-postcard-first-entrance-unposted","title":"Crystal Cave Black Hills SD Postcard First Entrance Unposted","description":"Antique black-and-white postcard showing the First Entrance to Crystal Cave in the Black Hills of South Dakota. The image features a rustic cave path with wooden railings leading into the cave entrance, with the caption printed on the front: “First Entrance to Crystal Cave, Black Hills, S.D.”\u003cbr\u003e\n\u003cbr\u003e\nThe back is divided and marked “Post Card,” with correspondence and address sections. It is unposted, with no writing, stamp, or postmark.\u003cbr\u003e\n\u003cbr\u003e\nLikely dates to the early 1900s–1930s era. A nice collectible South Dakota tourist postcard, especially for collectors of Black Hills, cave attractions, early travel souvenirs, or vintage photographic postcards.\u003cbr\u003e\n\u003cbr\u003e\nCondition:\u003cbr\u003e\nGood antique condition with expected age toning, light corner and edge wear, and minor surface wear from age and handling. Please review photos closely, as they are part of the description.\u003cbr\u003e\n\u003cbr\u003e\nApprox. size:\u003cbr\u003e\nStandard postcard size, about 5.5 x 3.5 inches.\u003cbr\u003e\n\u003cbr\u003e\nDetails:\u003cbr\u003e\n\u003cbr\u003e\nSubject: Crystal Cave, Black Hills, South Dakota\u003cbr\u003e\nType: Vintage\/antique souvenir postcard\u003cbr\u003e\nEra: c. 1910s–1930s\u003cbr\u003e\nBack: Divided back\u003cbr\u003e\nPosted: No, unposted\u003cbr\u003e\nWriting: None on back\u003cbr\u003e\nLocation: Black Hills, South Dakota","brand":"Etsy","offers":[{"title":"Default Title","offer_id":41157275353137,"sku":"ET-4505460099","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0603\/2618\/2961\/files\/il_fullxfull.8021507854_faix.jpg?v=1785954485","url":"https:\/\/belcaroheirlooms.com\/products\/crystal-cave-black-hills-sd-postcard-first-entrance-unposted","provider":"Belcaro Heirlooms","version":"1.0","type":"link"}