[Boatanchors] Help ID a 1939 Superior VTVM with a large round 7" meter

[Ray, W4BYG]

I have an old Superior VTVM, 1939 vintage which although is complete, is in
pieces.  It has a large round 7" meter in a fairly large rectangular
cabinet,  The parts and cabinet seem to be in good physical condition and is
definitely worth restoring.  I would love to be able to identify it and find
a schematic, so I can rebuild it.
 
Bama doesn't list it.  I don't see anything like it on line in a web search.

 
Any old, old, hams around that remember this meter to help me ID it?  Anyone
know of a source to help ID?  Any early 1940's publications that might have
an add for it?
 
Your assistance will be appreicated.
73,
 

Ray, W4BYG 

"The Republic can survive a fool for a president...  It is less likely to
survive a multitude of fools, such as those who made him their president."