Mike & Liese on Twitter: "Awesome day @TheGrandChapel today... Vintage 70s #drumkit including Black Beauty snare, stunning basses & a REDDI, and a Ball & Biscuit #microphone to play with 😁😊. (Sorry,
STC 4035 Omnidirectional Dynamic (Circa 1953) | Martin Mitchell's Microphones
Biscuits and secret messages: The intriguing history of WW2 BBC technology - National Science and Media Museum blog