Alejandro Pettovello escribió:Rein,
I think there is a mistake, photogravure watermark is "m", not "M"...
Alejandro,
yes and no!
The "m" relates to the watermark having the line of AЯ running parallel with the short side of the stamp! This is the concept of Bardi and Gomez [CEFILOZA]. I do NOT follow that as it does not consider the direction of paper being the first characteristic to be noted - first and always to be recognized! When the direction of paper runs along the long side of the stamp I use the "M" and when it runs parallel to the small side of the stamp I use "m"!
I can use the "m" and "M" in all rectangular stamps all over the world regardless of their having a watermark!
The Argentina no watermark stamps can not be described by Bardi's/Gomez' 'm'/"M"! In my system I can! The line of of AЯ in relation to the direction of paper will be fixed by my "parallel" or "orthogonal" watermark!
The airmail stamps have the orthogonal German [Stinnes] watermark and the direction of paper parallel to the long side, hence my "M"!
saludos, Rein