Thanks Dom.
I didn't try with a film now, but in few week i would do it.
The Bolex technician told me that for old H16 they must run 20s at 24fps without slowdown.
For mine, the speed is constant without charge exept at the end with a slighty lost of speed.
I have use my work strobe gun.
I will do a service later. I will use the camera for fun (not as pro) for sure. For me it's not a static collection object. It's alive and need to be use. As for old racing bike or car, the best way to prserve them is to use them.