The Columbus model 809 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1958.

7-valve + eye broadcast-band radio or radiogram, magic eye tuning.

There is a model 809S, with a different circuit - a stereogram.  This model, the 809, is mono.

Similar to the 810, although the 809 does not have short-wave reception.

Valves (7 + magic eye): 6BA6, 6AE8, 6BA6, 6AV6, 6AQ5, 6AQ5, 6X4 and EM80 Magic Eye

Frequency Bands: 1

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

The valve lineup is believed to be right - the circuit is not held, but is probably very similar to the Columbus 810 without the shortwave band.

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.