You have an 1883 Seated Liberty coin. Measure it up against a modern dime, quarter, etc. That will tell you which denomination of coin it is.
Further, your coin has been turned into a love-token. A love token was a popular way of personalizing a common coin into a personal charm or good luck piece. Yours has initials carved into as it's central theme, potentially "ACP"?
Actually, it would probably HELP the value a little, as 1883 is not a low mintage year for seated anything. People do collect love tokens. However, I would think it is probably worth more to you and your descendants as a family heirloom.