5-valve mantle radio
Interestingly, around the same year an English company (The British Distribution Company, or Bridisco) released a crystal set with a remarkably similar design, seen here
Intermediate Frequency: 455kc/s most likely
Frequency Bands: 1
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.