From RROCA-info
Number produced: 492
Original Specification: 6 cylinders, overhead valves, 89 mm. x 114 mm. (4257 c.c),
single plate clutch, 4 speeds, coil ignition with standby coil, 4 wheel brakes with servo,
suspension independent front with enclosed coil spring
and semi-elliptic rear, wheelbase 136", chassis weight
3040 lbs., tyres 6.50 x 17.
| Chassis Series | Year | Comments |
| WXA 1-109 | 1938/39 | |
| WRB 1-81 | 1938/39 | |
| WMB 1-81 | 1939 | |
| WLB 1-41 | 1939 | |
| WHC 1-81 | 1939 | |
| WEC 1-81 | 1939 | |
| WKC 1-25 | 1939 |