Cromwell was manufactured by Collier & Beale Ltd,
they were distributed by H. W. Clarke Ltd .
Currently there are 10 documented models.
| IMAGE | YEAR | VALVES | BANDS | MODEL CODE |
|---|---|---|---|---|
 |
1933 | 5 | Broadcast | Cromwell 5AV 'Series 1' |
 |
1935 | 6 | Dual Wave | Cromwell 6LSA |
 |
1936 | 5 | Broadcast | Cromwell 5AV Series 2 |
 |
1936 | 7 + magic eye | All Wave | Cromwell 7AW |
 |
1939ish | 5 | Dual Wave | Cromwell model 520 |
 |
1939 | 6 | Dual Wave | Cromwell 6CV3 'Server' |
 |
1946 | 6+magic eye | Dual Wave | Cromwell model 726 |
 |
1948 | 6 | Broadcast | Cromwell 618R |
 |
1951 | 5 | Dual Wave | Cromwell model 5251 |
 |
1951 | 6 + magic eye | Dual Wave | Cromwell model 7251 |
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