The Bell Oak Mantle was manufactured by Bell Radio-Television Corporation Ltd in 1954, it was in production for 2 years. It's part of the Bell Colt series.

Other radios based on the same chassis:

The Oak Mantle was a 5-valve broadcast band Colt chassis in a solid oak (natural or dark coloured) cabinet. 

This was the predecessor to the Planet model and is typically sighted with a 5B4 or 5B5 Bell Colt chassis fitted.

Bell Oak Mantle
Radio and Electrical Review, June 1955

The Bell Oak Mantle is part of the 'Bell Colt' series.

There is considerable information on the main Bell Colt page about this long-running Kiwi icon.


Bell Colts ran from 1951 through until 1980 - the longest running model of NZ built domestic radio.  It saw many different engineering changes over the years, and the last few models dropped valves in favour of new transistor technology.

Please note that not all radios shown in this series were known as Colt's - the Planet, the Mercury etc were models in their own right - but they have a Colt chassis in them and so are included here as part of the wider Bell Colt dynasty.

The items in this series are

Technical Information

Valves (5): ( ECH41 or ECH42 or ECH81 ), EF41, EBC41, EL41, EZ40

Intermediate Frequency: 462kc/s

Frequency Bands: 1

Chassis Notes(most schematics can be clicked to download a full size version) Early versions used all rimlock valves, however later versions replaced the ECH41/42 with a noval ECH81. Some chassis' were stamped with 5B4, but not all of them.

Other documented models using this chassis (2 in total)

1954 Bell Colt 5B4