Found another frame today in south west France, near the Spanish border. I walked right past it, but my friend Al said " isn't that a rigid 16h frame ? ". It was outside an old car repair garage. The owner had a few more bits in the back shed, a toolbox, rear mudguard and stays, rough front guard, barrel & head, dolls head gearbox ( one lug broken off ), magdyno, rear stand and a few more odds & sods in a box. He said I can have the lot for 150 Euros. How could I refuse ! I couldn't take it today, as I was riding my old 1950 Panther 100, but I'm going back tomorrow to pick it all up in my Citroen 2cv.
You can post photos but it requires an external hosting service. I use imgbb. It's free and straightforward..choose the HTML full linked option.
The locking toolbox was used 1936 - 1940, but earlier versions were narrow, as per civilian. The wide WD type holds quite a bit more - Not that you'll need tools all that often on a WD16H :-)