The WG-580 existed about 2001 according to my price lists. It looks like it has a Floyd Rose, Rosewood fingerboard, and a Hum, single, hum pickup configuration.
It's from the WR Series produced that year, the top of the line being the RS-980 and CS-780, the economy modesl were a variety of WR-150 guitars.
Retail list price at the time was $749.90, with an additional $139.90 for the case.
Thanks,