The Columbus model 92 was manufactured for Columbus Radio Centre Ltd by Radio Corporation of New Zealand Ltd in 1954.

A smaller 'budget' version of the model 90.  The magic ear tone system was removed and replaced with a simple tone control, and while the model 90 featured a 10" speaker, the 92 used the more common 8" model (Note: the photographed model has a Pye oval speaker fitted, this is not the original).

Valves (6 + magic eye): 6K7G, 6K8G, 6K7G, 6B8G, 6V6G, 5Y3G and Y63 Magic Eye

Intermediate Frequency: 455kc/s

Frequency Bands: 5

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

1954 model, however many sighted examples show a first digit of 1 - was there an early version of the model 92?  Or was this an anomoly.

1954 Columbus model 92

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.