Ho trovato una penna simile sul sito web di Tom - Penboard.de. La penna è probabilmente Fend /Fendograph/.
Questa è la descrizione e la foto:
"This is a very interesting solid silver pen, featuring a push knob filling system, similar to what is found on Montblanc Meisterstück pens from the 1930ies. The sac filled pen is operated by the blindcap, that is screwed out 5 mm, but not screwed off. In that position, it converts to a a push knob, that operates the filling system.
Fend was founded in 1899 in Pforzheim, the area where the German jewellery industries was based. Many of the German overlay works of Montblanc in the 20s and 30s where done by Fend."
