The dial is slow (sticking). p lease look at the photos as this.
Two Plessey Communications BROWN Vintage Landline ROTARY TELEPHONE
Original 1963 Advert Plessey UK Electrical Connectors Mining Industry
Original 1954 Advert Plessey Complete Aircraft Wiring Systems
Original 1950 Advert Plessey Aero Pump Design British Aircraft
WW2 RAF Lancaster Flight Engineer Warning Lamp Extension Lead Plessey
Original 1953 Advert Plessey Complete Aircraft Wiring Systems