Battery / mains portable with flip-front dial, sometimes known as the Flip-Front, or Picnic Radio.
Battery: Eveready 753 dual-A-and-B pack, 9V and 90V, similar to this:
There is a switch on the back to select battery or mains operation, and then the on-off switch is incorporated into the dial, so the radio comes on when the dial is opened.
Burgundy (Brown) with Ivory flip
Grey with Ivory flip
Mint Green with Ivory flip
Baby Blue with Ivory flip
Red with Ivory flip
- There is mention of a gold coloured one in advertising, but one has never been sighted.
CAUTION: The cabinets on these sets are fragile, and undamaged cases can be hard to find - especially the backs. Due to their age the handles should not be trusted, carry them carefully.
Intermediate Frequency: 455kc/s
Absolutely full of Hunts brand capacitors (and 2 Ducons) - don't expect the chassis to be functional without a full recap.
Schematic and service details similar to 5150AB
General Construction Notes for Collier & Beale Ltd:
Model numbering followed no real sensible scheme until around 1940 - and prior to 1934 apparently no model numbers were assigned at all.
From 1940 a 3- or 4-digit system was employed where the first digit indicates the number of valves, the second digit is the number of bands and the third is the year of manufacture. From 1950 the last digit became two digits, eg: 5151 is a 5-valve broadcast-band only from 1951.
From 1957 model numbers were replaced with model names, ie the Pacemaker Buffalo - which makes the year of manufacture hard to determine unless service info is consulted (although C&B often released service info after the radio, and the date on the service info was for its release, not that of the model.