Hallo Forum Wie sie Sind, here are some pictures of my Monitor 26 petroleum lotlampen.
Ich estimate this lamp was made the mid !950's early 60's, as it is of the later design for instance the handle and the burner nozzle, which ist made in 2 parts where the older version being made in just one section.
On this lampen there is a safety valve/pressure release valve fitted in the filler cap