The callsign lookup at
www.vanityhq.com shows an issue date of 27 February 1981 , but that's not necessarily the earliest date for your license .If you held a different callsign prior to your current one , maybe a Novice , you could look it up there for further info . Otherwise , go to W3HF's webpage , linked below , and use the link to leave Steve an e-mail . He knows more about callsign history than anybody else I know of , and often volunteers to help folks with such matters .
Russ , W5RB
http://www.geocities.com/w3hf/