I'm not sure I ever posted these unneeded items here, so I'm going to be sure to give folks a chance at them before I part them out. Here's what I've been able to learn about them.

"UHF Standby Transmitter Receiver". Late 1960 to 1970, cold-war era, British made standard UHF Stand-By transmitter/receiver sets for RAF. 238-248 MHz, 2 xtal controlled channels, 3 watts output. Apparently used in many fixed wing & in larger rotary wing aircraft.

These 2 NATO Reference Numbers on labels of one set:

5821-99-945-6726

5821-99-652-3788

Transmitter Receiver Radio

This label on other set:

transmitter receiver type M4

10D/23507

If any interest, maybe we can work something out.

Wayne

WB4OGM