I actually thought this lamp was from Franz Zimmermann or Nulite. But when I had disassembled and cleaned it, I found a manufacturer mark which I didn't know yet: peebee. So it is a Phare Besnard by Maris et Besnard from France. The pump valve was totally rusted, with a new ball (1/4") it works again. The original pump got a new leather. Only the Mica cylinder has to be replaced. Phare Besnard -peebee-
Congratulations Leo here is an idea of the PB's history https://weblampesapression.wixsite.com/lampes/france-peebee
Thank you, Merci beaucoup, Danke schön! This was the first what I've seen from the pump valve: I couldn't imagine anything like that. A friend of mine luckily has a similar " Wunderlampe " and could help me with a picture of the correct valve. Unfortunately I had no bearing with matching balls, so I bought 50 balls in 1/4". Now I am looking for 49 more lamps with such a valve