The Columbus model 051 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1940.

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Valves (5): X65, KTW61, DH63, KT61, U50

Intermediate Frequency: 455 Kc/s

Frequency Bands: 1

Chassis Notes(most schematics can be clicked to download a full size version)

1940 Columbus model 051

General Construction Notes for Radio Corporation of New Zealand Ltd: The first digit of the serial number typically indicates the year of manufacture of RCNZ chassis' (although not the decade - that requires a little knowledge of the valves, construction, etc). Sets from around 1934 onwards were often (but not always) constructed in a distinctive pressed 'baking pan' style chassis, seemingly unique to RCNZ.