The Reflectograph is a monophonic tape recorder used by Delia at the BBC Radiophonic Workshop. Delia says it ran at 7½ inches per second, while a BBC inventory lists a Reflectograph running at variable speed from 3 to 8 i.p.s.
The one feature that stood out was the Vernier speed control that was fitted to later decks allowing the user to accurately set the speed anywhere between 3 and 8 ips.
The Reflectograph RR 102 industrial version originally released in late 1956 was used by the BBC amongst others. [...] The BBC was a user of the RR102, particularly in the Radiophonics workshop under Daphne Oram.