VBD2 is closed. Please go to https://vbd3.co.uk instead.

The NAMC’s “Catalog of all Series Matchbox Models” (first edition), AIM's “1-75 Series Regular Wheels” catalogue (second printing, 1983), Stannard and Houghton do not list any variations not already identified by Nick.
U.K. Matchbox did not examine the model.

No new variations have been found to be added to the 68a Austin radio truck page.