2006-2021 PF70 Gold Buffalo Set | B.C. Bullion
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2019 W GOLD PROOF CASTLE SIGNED $50 BUFFALO 1 OZ COIN NGC PF 70 UC EARLY RELEASE | eBay
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2021 American Gold Buffalo 1 oz $50 - NGC MS70 Early Releases Castle Signed [21-BUFF-N-MS70-ER-MC-NSL] - Liberty Coin
American Buffalo Gold - A Reintroduction - Currency and Coin
The Coin Vault
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2019 SMITHSONIAN SILVER Buffalo at the Castle 1 Oz. - Etsy
2019 National Zoo Commemorative - Buffalo at The Castle - Smithsonian Institution Private Issue Silver Coin (NGC PF70 Ultra Cameo) | Pristine Auction
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2019 Smithsonian Buffalo at the Castle 1-oz Silver NGC PF70UC | GovMint.com
2019 Smithsonian Buffalo at the Castle 3-pc Gold & Silver Set NGC Gem Proof Niekerk Signed | GovMint.com
2006-2021 PF70 Gold Buffalo Set | B.C. Bullion
2022 American Gold Buffalo & Eagle set NGC MS70 FDOI Michael Castle Signatures
2013-W $50 One-Ounce Gold Buffalo MS70 NGC | Park Ave Numismatics | Rare Collectible Coins | Precious Metals
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2006 American $50 Buffalo NGC PR70 W/Michael Castle Signature
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US $50 One-Ounce Gold Buffalo 2013-W Gold Buffalos NGC MS70 | MA-Shops
1919 D Buffalo Nickel - Choice BU / MS / UNC - For Sale, Buy Now Online - Item #581298
2006-W $50 One-Ounce Gold Buffalo, Mike Castle Signature, PR70 | Lot #93123 | Heritage Auctions
2019 Smithsonian Buffalo at the Castle 1-oz Gold NGC Gem Proof | GovMint.com
