if the chassis no is 18361, it would be contract no V.3922 or V.3988 or A.1445. issued late 1940. for austin K2Y ambulance( that should be on the body plate) W.O. no. A1205912 the no. on the bonnet( +/- 30) this is a bit of a guess. you would really need to know the contract no. or better the bonnet no ( also on rear door no.)
Ooh Rupert - I think "No.18361" refers to the Image Number on this particular Web-Site....rather neat, though, if it is close to the Austin's actual Chassis Number.
Added by Bob on 16 July 2009.