Manufactured for Turnbull & Jones Ltd by Radio Corporation of New Zealand Ltd in about 1951.

The model 5M was an updated version of the model 5, using all miniature valves.  The tuning arrangement was also modified to give a better spread of the cluttered upper frequencies.

Valves (5): 6BE6, 6BA6, 6AV6, 6AQ5, 6X4

Intermediate Frequency: 455kc/s

Chassis Notes: 5M used all miniature valves as opposed to a mix of miniature and GT valves used by the original model 5.  Also had a revised tuning arrangement which spread the broadcast band more linearly over the tuning range.  Used a RCNZ 5" EM speaker.  The dials are plastic and prone to fogging and cracking from UV damage.

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.