Today i "found" this lens.
I bought it from a belgium photographer. His dad (who was also a photogrpaher) bought it new !
As you can see it says hermagis paris Eidoscope 4.5 no 1
Now it becomes weird.
A nr 1 should have had a focal lenght of about 19 inches and w width of 3.8 inches.
This one has a focal lenght of about 28 inches and has a width of 5 inches.
These numbers come much closer to a hermagis eidoscope no 0
anyone has an idea ??