National was manufactured by various companies, they were distributed by John Burns & Co. Ltd. Currently there are 3 documented models.
Not to be confused with National from Japan (National Panasonic).
There seem to have been two major manufacturers - Westco Products and Radio (1936) Ltd.
| IMAGE | YEAR | MODEL CODE |
|---|---|---|
 | 1937 | National BCU |
 | 1939 | National CMU |
 | 1940 | National ECU |
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