Philips 2531 (1930)

Philips 2637 (1931)

Philips 830A (1932)

Philips 631A (1932)

Philips 334A (1934)

Philips 336A (1934)

Mullard

Philips 335A (1935)

Philips 531U (1935))

Philips 520A (1935)  

Philips 522u (1935)

Philips 796A (1936)

Philips 338A (1937)

Philips 339A (1937)

Philips 343A (1937)

Philips 461LU (1937)

Philips V4A (1937)

Philips 360A

Philips 360BV

Philips 361A (1938)

Philips 362A (1938)

Philips 462A (1938)

Philips 470A (1938)

Mullard MUS12 (1938)

Mullard X44 (1938)

Philips 215A (1939)

Philips 216A (1939)

Philips 284A (1939)

Philips 284U (1939)

Philips 288A (1939)

Philips 289A (1939)

Philips 289BV (1939)

 Philips 291A (1939)