Vintage Unbranded marked WO20 4 80 Acoustic Guitar

I have for sale a unbranded guitar the only markings are stamped on the neck block as WO20 4 80. This guitar does come with a case. The guitar measures as follows lower bout  15.25" upper bout is 11.75" the body length is 19". the nut width is 42mm. The string height at the 3rd fret is 2mm and at the 12th fret is 4mm. The scale length is 25.5. There are dings, dents and scratches constant to it's age. If you have any Questions Please Contact Me. Thank you.