MacGregor GG Tx
Posted: 07 Nov 2020, 14:40
Sold by Ripmax in the UK and my first RC transmitter from 1969, used the MacGregor Supermac Relay RX and an original Rand LR3 in a Mercury Matador that lasted only a few flights! 
Radio control in its simplest form. Once for right, twice for left!
https://mode-zero.uk/