Quote:
Jorge: "Diamant Ambulant"
We in the West translate Ambulant as TPO.
Would this be in any way suggestive of this Postmark?
or have we made an error in translation?
Rod, yes we use "Ambulant" to refer to TPO (railways, etc)
In the Belgian case this "Ambulant" should be understood rather as "travelling" or "in transit".
These are a few examples where this postmark is used to "kill" any stamp which was saved from being cancelled in the initial post office:
Belgian letter :

Letter from France:
