Even paper 1 and 5/6 have similar fibers
Maybe you are right, paper 1 and 5/6 have the same source. We can not trust in TIEV informatión, I have seen quite inconsistencies in his information, many philatelists tell that TIEV made his papers list like stamp dealers because this lists are exactly the same.
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it would be a pity if you are right in saying that we can not really trust the TIEV information! What we need are printing history sheets combining typed out information plus hand-written!
How much do you have of that??? Do you have them in digital form??? Could you publish them here???
Stamp dealers may play a too dominant role!? But why should collectors accept that?????
Two consecutive days, sheet-numbers continuing! Start using a new reel on January 23, 1981, after 1.200 sheets or some 300 meters???
Where does this 133.200 for paper #1 come from?????
Paper #1 was in use from August till November 1975 [!], not LATER!
In order to print so many sheets you have some 30 kilometers of paper or about 10 reels?!? Kept apart for 5 years to print this 4p??
Ordering the 4p it was meant to use paper coming from H.& L. Slater so why start with Americano that had been lying around for 5 years????
The sharp diagonal lines descending - with the eje de enrollamiento vertical - is typical for the gum arabic used in the November 1975- August 1977 period! I coined it paper #1B ....