This is a Sears brand guitar sold in the 60's, built by Harmony.
This guitar also sold under the Harmony brand as the H-49. The
"Jupiter" is similar to a Les Paul but with a semi-hollow body...
It's incredible light.
The "Jupiter" is remarkably versatile with a great sound. It
features two DeArmond pick-ups built by "Rowe Industries",
volume/tone for each pick-up and a three position selector.
There's a fifth knob...
A rare "BLENDER" switch. This special control is activated when
both pick-ups are in the middle position on the 3-way switch. The
"BLENDER" knob gradually shifts the weight between the pick-ups.
The '61 Silvertone "Jupiter" has an extremely wide range with the
"Blender Circuit". It packs punch for such a small guitar.