Wow, lots of neat toys at your house, GS. I've never seen one of these. Plate implies it was made in Grand Rechain, Belgium - which looks like barely a crossroads east of Liege - so a timely post, racing calendar-wise. Way cool.
Great story, Doug.
Here it is in an old VAR catalog, item #485:
https://sheldonbrown.com/var/pages/var0035.html