The RNF troops needed all kinds of services, including dental care. For this, GM Holden built this Chevrolet C15A van plus rather posh looking trailer.
"N.E.I. Army Dental Services truck. Views of vehicle from side angle, with trailer attached. Signage on trailer reads: N.E.I. Army Dental Service, with cross emblem on trailer. License plate reads: RNF MED1."

Source:
https://viewer.slv.vic.gov.au/?entit...&mode=overview
PS: we have seen these pictures on here before, but somehow I cannot find them again