Originally Posted by brokenenglish
I think it might well be the Toni Clark (Practical Scale) 1/3 Pitts.
Practical Scale has now been German based for decades and I think addresses a mainly European market, which would explain the French language (Belgium, Switzerland, etc.).
I have a similar Practical Scale plan (a BE2e) and the sketches and legends (character font) look similar.
Anyway, here's the link. Have a look and see what you think...
Thank you for the interest in my problem. The model plan in question is a 33% S2-A 80 inch span.
The Clark is an S1-S at 33% with a 68.5 inch span. It is more obscure than some but I have the Clark as well. It is a fairly sophisticated plan. I actually have Toni Clarks custom ZG62 with damped mount and custom intake with SS exhaust cannister to accompany the plan.
Thanks again. You have the only attempt thus far. I amazed that no one knows.
Thanks again, Bill