Another take on the Washburn serial numbering system --
Though fully eight digits, it's on a BT-2, so 1996-2000. If the serial number has any date validity whatever, the guitar is 1998, a one-digit year code.
I spotted this decal on a BT-4Q-LH --
This, of course, messes up some of my theorizing.
I'd assumed that the guitars went from being "Billy T" to VERY briefly "Bantam"** until fetching up as "Maverick."
The model (the only lefty in the series) doesn't appear until the 1998 pricelist, while "Maverick" was applied fully a year earlier, so I'm puzzled.
** -- intending to repurpose the "BT" prefix, but I think Grover Jackson balked as the name was already in play for the XB basses which had his name on every headstock. As a further guess, Jackson may have said "pay me" for the implied association, & Washburn moved along.