The bodies were made in Lower Walsall and the final assembly took place in Graisely Hill.
- Wheel base 7ft 7in. Track 3ft 9in. Ground clearance 8 1/2in. Overall length 11ft 6in. approx.
- Overall width 4ft 9in. Height of chassis 17 1/2 in. Weight 14 to 16 cwts.