[Milsurplus] Mars Electronics

[Nick England]

Hi gang - has anyone ever seen any Mars Electronics equipment? Or info
about them?
http://www.navy-radio.com/misc/mars/mars-ad-6311.JPG
I have what I suspect is the world's largest collection (2 items)
One is an AN/FRT-17 transmitter for which I have a manual.
The other is the Mars equivalent to the CV-157 SSB converter for which
I would love to find a manual. It is certainly built like mil gear but
I haven't ever come across evidence that it had an AN/ number.
I know Mars was formed from the remains of Crosby-Teletronics, but
have no idea how many of these gadgets they may have actually built.
cheers,
Nick
www.navy-radio.com