The Courtenay 6A was manufactured for Turnbull & Jones Ltd by Radio Corporation of New Zealand Ltd in about 1932.

7-valve broadcast band radio.  Manufactured by W Marks prior to becoming RCNZ.

Valves (7): 227, 551, 551, 551, 224, 247, 280

Frequency Bands: 1

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

7-valve TRF, uses 227 as diode for detection

1932 Courtenay 6A

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.