Never seen one of these before, or on Matsumoku site. late 1970's, early 1980's. WA probably stands for Walnut finish?
Lovely semi-acoustic electric guitar, by Aria when they were still MIJ.
Comes in a lovely fitted Kinsman case.
Varitone switch as well as coil tapped humbuckers, give a fantastic range of tonal options.
Clearly based on the BB King style of guitar by Gibson.
A few marks to head, see photo, otherwise in excellent condition for age.
Collection always preferred, but will arrange for insured postage.