Is Beldam correct? Paquet Markings

[Michael Dorosh]

http://www.armouredacorn.com/Refs-%2...0Carriers).pdf

Beldam calls the 73/1 and 754/1 marking on the Carriers a "paquet marking" and defines it as a temporary marking denoting a vehicle's place in a convoy.

I've seen these markings in a few pictures. Some things to note:

a) they are painted on
b) they always coincide with the unit's Serial Number (i.e. the number given to the unit on Mobilization - double check with ON ACTIVE SERVICE by Mark W. Tonner and you will see this is true)
c) they always seem to end in "/1"
d) I only ever see them on Universal Carriers, but I haven't been looking very hard on other vehicles

I am guessing they are actually a unit identification code used during embarkation and not a convoy marking. Does anyone have any information on this? Has anyone seen these markings on other vehicles?