GPO Double Current Telegraph Sounder, used for Morse code communication. Probably from the late 19th or early 20th century.
Early GPO Polarised Telegraph Relay Type B (General Post Office) Circa 1880-1920
Vintage GPO 746 GREEN rotaary dial telephone late 60s early 70s untested
Early Double Wick Brass Whale Oil Burner 7/8”fitter
GENUINE GPO 205 RECTIFIER & 3.3K OHM RESISTOR (FOR GPO PHONE CONVERSIONS)
GPO KEYSENDER No. 5 (KEYCALLER) For GPO TELEPHONE EXCHANGE?
Double Sided Coin 50p / 50 Pence Coin [Double Headed / Double Tailed Coin]