This used Hercules Powder DuPont antique advertising letter opener is a collectible mining-related desk item suited to buyers interested in miner memorabilia, industrial advertising, or vintage paper tools. Its appeal is likely strongest for collectors of DuPont or Hercules Powder pieces, as well as anyone building a themed display around mining history. Free shipping is included, which may help when comparing similar vintage items. Because this is a used piece, buyers should review photos and the listing description closely for signs of age, wear, markings, and overall condition before purchasing. If you are looking for an antique advertising collectible rather than a modern office tool, this item may be a relevant choice. Check the listing for full details. Hercules Powder DuPont Antique Mining Miners Advertising Letter Opener. Condition: Used, Made in United States. Listed at 150.00 USD. Nice Mining Antique.Nice Mining Antique.