I agree Leyland Retriever..there were in fact no pre-war AEC 6 x 4 chassis noted as being 'Wire Less' lorries but I am no expert. My census number book suggests Leyland Retriever 'Lorry 3 ton 6 x 4 Wire Less' to Contract V.3390, numbers L 4151097 to 4151101 which would be a late 1938 contract I believe.
Compare front ends:
1938 AEC Marshall
Retriever
