You know its not a 1988. You know that Washburn in the very late '80s I think it was, used only the last number of the year, assuming you'd know the decade. They did not do that in the late 1970's. So I have a picture of a 1980 Raven, also with the stickered Serial Number that says 80369E.
So I have to conclude that somebody fat-fingered your serial number and it should have been 78312E
Interesting! Not the first mistake I have seen from Washburn.
Note: the reissue Raven was called an SB-5 and was a 1994 model. (Never saw a 1993 or a 1995, are there any?) But sure never had a 1988 reissue!!