The Columbus version of the model 35 has two distinctly different styles due to two different chassis versions. It appears the early version uses an escutcheon and round dial-style as found on older models like the 1937 model 38 spiral dial set - with mechanical 'eyes' showing the volume and tone settings. This appears to have been removed in favour of a simpler oval dial design with no other indicators other than the magic eye on the later sets.
Intermediate Frequency: 456kc/s
Chassis Notes (most schematics can be clicked to download a full size version):
Two known versions of the chassis - the first used 6- and 7-pin valves while the later revision uses octal valves and (at least in the Columbus version) has a simpler dial assembly.
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.
|1938||Courtenay model 35|
|1938||Columbus model 35 - this set|