210HF 210LF 230SP by Six-Sixty Valve Company (Mullard related)

Description

The Six-Sixty Electron Company Limited was registered in May 1923 and was established in Acton Lane, three years later SS signed a deal with Mullard to sell valves with the SS brand. It was in 1928 that Mullard bought all shares re-branding the business Six-Sixty Radio Co. Ltd until its end.

The valves we show here are  pair of 210LF; 210HF and 230S.