There is confusion with this brand or this variety is simply not listed in the Michel catalogue. The fact is that Bremien Papier was strictly applied to number 23, which is indicated in the Michel catalogue. Brand paper glows in Ultraviolet!!!
The question is how number 15 could be printed on paper for test brands that went under number 23PIII.
All information about trial brands is in the last photo!!
RRR+





