With reference to the colour bars on the Sigs Landy in an above photograph I note that the colour bars are the same if not very similar to the ones with which 87 Transport vehicles and equipment were marked.
I had always understood that these colour bars translated into numbers as do the current Christmas trees, but apparently not.
The Sigs vehicle looks to be brown/grey/brown with an accompanying number of 1309, whereas 87 was brown /silver/ brown with an accompanying number of 1107.
I say silver because I remember painting all my gear with good old common silverfrost, but perhaps that was close enough to grey and easier to come across, hence its use.
If the colour sequence is the same in both cases then perhaps the colours signify a delivery point and only the numbers signify the unit.
The Corps were different so that is ruled out. Vung Tau as a destination was a common point though.
Someone will find an answer I am sure and enlighten me.
This photograph of a Unit Members steel trunk came to me following enquiries through our Unit Association and show the colour bars.

Regards
Glen