Whilst vehicles which were in Vietnam may have had such markings the RAEME Provos (inspection team) insisted that all such markings be painted out on vehicles used within Australia. My unit had a section in Vietnam but that did not wash with Their Lordships. No Christmas tree and no Skippy. Believe me or not I was one of the lucky blokes who had to paint them out with spraying enamel and a brush, lots of fun.
Geoff O.