Foro de Filatelia Argentina

Berlin definitives 3M:

Rein,
Would not it be mark for a photoelectric cell? We used them in the rollfed Goebel: when the cell got blank because that dark mark interrupted the "vision" of it and sent a signal that activated the cutting edge to separate sheets from the roll. Saludos,
José

José,

this is the most obvious explanation!

But why doesn't Michel mention a thing about it in the specialized catalogue of Germany???

saludos, Rein

Rein,
Why don´t you ask Michell about these omittions? It´s not the first one you mention. Saludos,
José

José,

there has been no reaction in the Michel Forum so far!

http://forum.briefmarken.de/index.php?/ ... tenfehler/

saludos, Rein