Anyone know about the University Master Speaker

In the late 1950's ( probably around '57) University Speakers in White Plains, NY made a unit called The Master, having a 15" woofer, a midrange and a horn tweeter. I am led to believe it was available as either a kit with components or as an assembled unit from the factory.

I think this is the speakers that I have: for drivers: it has a C15W woofer, a T-30 midrange and a HF 206 horn tweeter, with an N-3 crossover; they are in a beautiful 6-sided mahogany cabinet - not a small box: approx. 37+" tall x 28+" wide x approx. 20" deep at the flat back side.
They've got to weigh over 100lbs/apiece.

I am presently powering them with: a McIntosh MC 2105, a Stromberg-Carlson ASP-422 or a Heathkit AA-30 - sometimes direct (since I have attenuators on all 3 ) or thru either a McIntosh MX-112 Tuner/Preamp or a Wolze Hardware Shielded Triode Line Preamp.

Since I have found very little info on these speaker cabinets, driver components or the company itself - any help regarding direct info from owners or those who know of this item, or web addresses and/or sites would be appreciated.

Thanks for your consideration... Bill Keller