SUMB (Simca Unic Marmon Boquet) MH600BS on Youtube
A number of SUMB owners have posted videos of their trucks on Youtube.
Here are the links to the ones I have found to date.
MonsieurP4
Lecamionneur29
Militaire22
AKA www.negoservices86.fr
6cylTDI
Lilou713
LAF911
This is actually a VIRD which is a slightly later model ...