Check the listing for details. Vintage P38 Military Can Opener 1951 patent sealed & directions J W Speaker Corp. Condition: New. Listed at 9.20 USD. The product being described is a vintage P38 Military Can Opener with a 1951 patent, manufactured by J W Speaker Corp. This collectible item falls under the theme of Militaria and is considered surplus personal, field gear. It is sealed and includes directions for use, making it a unique and historically significant piece for collectors interested in military memorabilia.The product being described is a vintage P38 Military Can Opener with a 1951 patent, manufactured by J W Speaker Corp. This collectible item falls under the theme of Militaria and is considered surplus personal, field gear. It is sealed and includes directions for use, making it a unique and historically significant piece for collectors interested in military memorabilia.