I have a Mumbo Jumbo model JSS serial number 19 signed by Simon Shaw, Camden, SC
I have played guitar for fifty-two years and this guitars' tone, volume and overall playability rivals any flat top acoustic guitar I have ever had the pleasure of playing.
I've had offers to buy it based on sound quality alone.
Nobody cares where the name came from or where it is made.

Just thought I would add my two cents worth.

The wizard