PYE M4000

See this phone in action on BBC TV Nationwide

BBC Nationwide car phone

 Prices quoted in film are £2850 +£100 install, £17-£18 a week for line rental or lease, calls are 8p for 4 seconds at peak times

The PYE M4000 System 4 Radiophone was made by TE-KA-DE, the company mentioned as the system 4 network suppliers.

PYE M4000 RAIDOPHONE Control unit and handset

Wireless outsider mentions the radiophone here ..

The radiophone is physically very similar to the radio described here 

Control Head Cable Colour Code

M4000 sold for £450
Pye M4000