The Columbus model 34 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1948.

5-valve plus magic eye all-wave radio, baby brother to the model 44 Cambridge (which has more details about the unusual design features of these two sets).  Early examples used the standard Columbus electromagnetic speaker however this was replaced by the new 10½" permanent magnet speaker by 1948.

1948 Columbus model 34

Valves (5 + magic eye): 6K8, 6K7, 6Q7, 6V6, 6X5 and Y63 Magic Eye

Intermediate Frequency: 455kc/s

Frequency Bands: 3

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

1948 Columbus model 34

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.