Ok I was going through some of my lower value stamps putting them together for my album and came across some 25cent Franco stamps. I noticed that for the 25cts stamps that I have there seems to be 2 different papers one is a matte paper the other is a glossy. Are the stamps in this series known to have different paper formats?
For the stamps that I have the difference seems to be in the type of paper used. The more mat finish of the one is thinner and less glossy. The other is noticeably thicker with more of a smoother light reflective surface than the other. And looks like it has a higher clay content in the finish of the paper. The printing on them is virtually the same. My catalog only shows the issue dates not the printing dates for the series. So I was unsure that they would shift papers in the middle of a printing. So if it was a completely different printing that would explain the paper difference. By the way it's a Scott 818