5-valve dual-wave with bandspread short wave band.
Appears to have been a 5-valve version of the venerable model 66 although not nearly as popular given the few examples found today.
Noted as being similar to model 52S
Intermediate Frequency: 455kc/s
Frequency Bands: 2
Chassis Notes(most schematics can be clicked to download a full size version)
56 service info unavailable, but it has been noted as being very similar to the 52S - see this service documentation and notes for more info:
Service information (RCNZ_-_model_52S_and_56_-_5V_DW_AC_Expanded_Shortwave_Tuning_-_1940.pdf) here
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.