5 x 1 oz Highland Mint US Flag 999 Fine Silver Bar Condition: Brillant Uncirculated Manufacturer: Highland Mint Purity: 999 Fine Silver Country: USA The 1 oz Flag Silver Bar by Highland Mint is a silver bullion bar produced by the Highland Mint, a private mint located in the United States. Highland Mint is known for producing various precious metal products, including silver and gold bars and coins.