{"product_id":"2026-leaf-metal-baseball-sean-gamble-pre-production-proof-1-1","title":"2026 Leaf Metal Baseball Sean Gamble Pre Production Proof 1\/1","description":"Rare 2026 Leaf Metal Baseball pre-production proof card featuring Sean Gamble. This is a one-of-one (1\/1) item from the production process, making it an exceptional find for serious collectors. Pre-production proofs offer a unique glimpse into card manufacturing and are highly sought after for their scarcity and historical significance. Perfect for the dedicated baseball card enthusiast or Gamble fan looking to own a truly unique piece.","brand":"Cardboard Superstars","offers":[{"title":"Default Title","offer_id":43376689250367,"sku":null,"price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0612\/9506\/7199\/files\/Document_20260523_0037.jpg?v=1781131679","url":"https:\/\/www.cardboardsuperstars.com\/it\/products\/2026-leaf-metal-baseball-sean-gamble-pre-production-proof-1-1","provider":"Cardboard Superstars","version":"1.0","type":"link"}