I had the opportunity to modify a few professional radios for amateur radio usage. Each radio has its own page:

.

BBC RT-61 / AEG Telecar9
AUTOPHON SE-20 handheld transceiver
ASCOM SE-110
ASCOM SE-140 / BOSCH HFG 168
ASCOM SE-540 (VHF and UHF)
Motorola MC Micro
PHILIPS/PYE MX294 and MX296 or AUTOPHON SE-156

You will find pictures and some informations about these transceivers (and lots of other) at the rigpix.com site.