Harvey-Wells Info needed

[George Maier]

I'm trying to gather info on a Harvey-Wells TS-90 transmitter.  It's
basically identical to the T-90, except that 6 meters has been added.
It's definitely a factory original, not a home brew modification, but
there's no reference to this radio in any CQ or QST ads of the 1950's,
catalogs of the period, nor does it show up in Moore's book or any book
for that matter.  Can anyone shed any light on this radio ?
Thanks & 73
George Maier - K1GXT