The Columbus model 619 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1958.

5-valve table radio, broadcast band

Valves (5): ECH81, 6BA6, 12AX7, 6AQ5, 6X4 (this is probably incorrect, check it)

Intermediate Frequency: 465kc/s

Frequency Bands: 1

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

Schematic is for stereo version (619S), mono version is probably similar

1958 Columbus model 619

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.