This coin is an 1804 half cent (draped bust; crosslet 4, no stems). This is the Cohen-12 variety, and is a Rarity-2 coin, which is defined in the Sheldon Rarity scale of Early American and Colonials as being one of between 501 and 1,250 such coins in existence. How many of these coins have survived in their 218 years of existence is anybody's guess.