GM4257 (1948)

GM2315 (1949)

GM2883 (1950)

GM4144 (1950)

GM7628 (1950)

GM2317 (1953)

GM6009 (1957)

GM5655/04 (~1960)

GM2308-03 (~1960)

Zelfbouw Buizentester

Buizentester I-177-b (1953)

AVO meetbrug (1951?)

Brüel&Kjær 2409 (1959)

Zakmetertje (195?)

Telequipment Servicescoop D31

Tech TE-20 (196?-197?)