I looked on Google and found a few mentions as well as a thread on TB which says they are Korean.
I found some funny translations of Korean reviews of the basses on websites - here's one :
It was reaped it was well constructed the light autumnal tints tree and em it became the line in the time which is appropriate
The family rain of top to become tender and the material feeling of the sound use is superior.
ni It rests and gold of the light pu to be controlled with fortune, theyl the blood su with
The bottom board makes with the ebony wood of the highest grade, the Tyrol style which plates with the nickel
lwu pu The high class to use your machine head it is it becomes worse.
This double base most big feature one performance the inside the volume which is abundant and the side
The possibility of doing it is it is a thing.
