[Linked Image from i.imgur.com]

In Argo's image, that Perron near the centre is a stamp noting a stage of completion plus the choke effort in the tubes was established by a mechanic in Liège at about the same time. Had the longarm platfrom been fabricated elsewhere, then the longarm would not wear any stage of completion marks. Also, the water-table is pretty much devoid of marks less the single Belgian. I will dig & study a bit more.

Serbus,

Raimey
rse