Are These R135? Help Understanding Paper Please

I inherited my father's collection so I am learning right now. Some questions for anyone interested in imparting knowledge:

He has these four in his albums under R104, but I think it could be a mistake. Which is surprising to me knowing his nature, however, they would seem to be R135s, what do you think?

Also, in the first photo, the stamp on the left is on violet looking paper, the one on the right is on blueish paper and the orange ink appears to have a smudge in the top left corner of the frame. Can someone tell me about the differences of the paper and if the smudge is of significance?

In the second photo the stamp on the left is a darker blue paper and the one on the right just looks really old? I'm not sure how to describe the color of the paper! The ink on this stamp (righthand stamp of the second photo) looks a bit more pinkish to me than orange, does that mean anything?

Any knowledge about all of these things would be so appreciated! Thanks for any help you may be able to offer while I am learning. And all the best.

The top left and bottom right are R135, violet paper. The bottom right is an R151, green paper. The top right looks like an intermediate paper, which is also an R135 but not quite as violet, however it might be green, it's hard to tell on a scan because every monitor is different.

The smudge is probably a fingerprint. Fun but no real financial value. The bottom stamp on the right has lived a very hard life, so it is faded, These stamps were on a paper designed to react to various chemicals, which also might have turned the frame pinkish.

Help me out with this one Revcollector, you said "bottom right are R135, violet paper", then in the next sentence you said "The bottom right is an R151, green paper"? Perhaps if you look at the top right stamp, appears to be on green paper to me, or am I seeing it wrong? Then you say "The top right looks like an intermediate paper, which is also an R135"? You also say it might be green.

I've always had trouble with the intermediate paper, does anyone else also have trouble?

Cheers

Dave

I meant bottom left is green. :-) Intermediates are best looked at with a green and a violet handy, then they become obvious.

Thanks, excellent help, you are outstanding, I would have never thought of this!

Cheers

Dave

It's also true that green papers glow bright green under UV, but intermediates glow violet under UV.

I was lucky enough to have been shown the differences in the papers early on. A great collector named Robert Cunliffe showed me by pulling 6 $5 proprietaries (RB10a) for the violet and intermediates and a 50 cent proprietary (RB8b) for the green paper out of his jacket pocket. That was like watching a magician pull a rabbit out of his hat to an 18 year old who was very new to revenues.

Lucky wasn't the word for it, when I was 18, after high school I was on my way to Vietnam!

Cheers

Dave

Fortunately I was able to avoid that particular problem.

wondergreen, if it isn't too much trouble for you (the results may not be worth the effort), could you show all four stamp reverse sides? In the right and proper orientation?

If it's too much trouble, then forget it.

Cheers

Dave

Pardon this being a brief reply as I have only a moment to reply. You are all so wonderful! Thanks for the new information. I am curious about WHY all of the different papers? Are some better or more desirable.
stampmaster, I would be most happy to post the other side! I can't do it until tomorrow or Monday as we are going out of town for the night and I have to work tomorrow night. Thanks again, this is so fascinating!

Hello again! Here are the backs of the R135s and R151. I have them in the same order as the first post and the same orientation. Thanks again for the help and for clueing me into the 151:

Top violet and green, bottom is green (which lived a hard life) and intermediate (which is always considered violet).

Thanks so much!

There were very large amounts issued of both, over 44 million of R135 and over 94 million of R151. The paper change was made because all the proprietaries were now being issued on green paper, and there was no reason to carry violet paper just for this design.