US: 1988 Booklet Definitives Color-Shift Printing?

In my experience.
Not "double printing"
Oft used terminology,  "mis registration" "miss registration" "color / colour shift"  

Considered EFO  Errors,  freaks or Omissions

value: Depending on the severity of the shifts, often matched up with "autotron bars" (Australia)   or "traffic lights"  to detect the proper operation of each colour cylinder

Values: "In the eye of the beholder"

Askphil:
Color misregistration : misalignment of multi colour printing plates, resulting in a color appearing out of position.
Color Registration: marks of different sizes and shapes used as an aid in properly registering the different colors in the printing process.
Color Separation: the process of preparing a separate drawing, engraving, or negative for each color required in the printing of a stamp.
Color Shade: commonly used to denote a variation of the same color.
Color Shift: variety where one or more colors of a multicolored issue are misaligned.
Color Smear: any unintended color that appears on a stamp due to a printing error, aka a freak.

Cheers BG,
The image is not clear enough, for me.
I have answered to the best of my ability. 
A specialist, may be aware of the type of printer used, that would go towards a definitive answer.
If the stamps were on a continuous roll lithography, then a double print would be impossible.
Maybe we have a specialist here on TSF with info on the 1988 booklets?

Hey !  that's a bit severe   ....nobody?   there's at least you and me  

Jokes aside,  I was of the opinion booklets would offer little in the selvedge.

Thanks for the further responses, khj and rod222.  Thanks also to salmantino for your post.

I agree that the image is not well focused in any case, so I have asked my friend if he can supply something better, ideally a scan with decent resolution.  If I get anything more, I will post it.  That may be more of an academic exercise at this point, as it sounds like from the comments that an item like this isn't particularly valuable, especially if this sort of occurrence was relatively common for this issue, according to khj.

Of course, the answer lies in the selvedge, which I should have known!

So in general, very small color shifts are usually considered flawed stamps. I used to use a lot of older postage for large mailings. Here is an example of a larger shift that I found, significant enough to give the stamp a minor premium of maybe a few dollars. Had the black been shifted down the same distance instead of up, out onto the stamp below, it would have been worth more.

right stamp: Scott US #1206(14Nov1962), 4¢ higher education
left stamp: black shifted up
2018 Scott catalog mint for normal stamp = 25¢ (Scott minimum catalog value)

Thanks again to rod222 and khj for your previous responses.

I asked my friend for a better image, and below is what I received.  I cropped off the bottom portion, as I don't think it adds anything more to the discussion.  Is this clear enough to discern anything from the characters in the selvedge?

I do understand khj's comment that it can only be a double printing if the letters and numbers (25 USA) are doubled too, and they aren't, so OK, that is not the answer.  In that case, if it is indeed a color shift, can you tell which color is shifted?

Personally, I am now thinking it must be black, because if you look at the 25 USA on the shifted example, it is further away from the left edge of the blue field compared to the lone example on the right-hand booklet.  Does that fit what we are looking at?

Thanks for any comments!

Thanks, khj

Ha ha, OK, I still misunderstood your meaning about the doubled numbers, but at least the better image has helped, and I do understand your explanation about looking to the selvedge for clues to seeing which colors are shifted and in what ways.  This has been a good learning opportunity for me!

Anyway, thanks so much for responding on this.  I guess my friend has an interesting curio for a specialist, but nothing of particular value.

That's what I wanted to know.

Eloquent explanation there, Kim.

I still had a query moment,   possibly illustrating how important good scans are.
The right hand booklet pane by the OP, one cannot see any "grey veins in the flower petals, they look just pure white
which is not the case, they should have grey tinges, perhaps the scan was not strong enough.

de61 is correct, the black text is also photogravure, not engraved.

Also a good point, the bottom panes would have come from a different "press sheet" (roll section) when the Goebel machine was used to make the booklets. In fact, some booklets were created where the underlying panes were from a completely different roll with different plate numbers! (see fishing flies booklets)

For doubling of one or more colors, technically, it might be possible that there happened to be a break in the Andreotti print run between those 2 press sheet sections, someone back-fed the roll exactly one or more plate widths before the photogravure printing was done, then restarted the press. But that is far from being a trivial thing to do. There is a reason why you don't see many double printings from the Andreotti Press (web-fed press, not sheet fed), even though there are lots of color misregistrations. Off-hand, I don't recall any double printings from the Andreotti Press.

The stems are doubled because they are not a single color, but a combination of colors. There is no "brown" color plate. Likewise, there is no "green" color plate for the leaves. To me, the doubled stem is a slightly different shade, and both of them are slightly different color from the stem of the "normal" stamp. My opinion is I am seeing the larger right shift of the "black" outline/shading of the stems/leaves/veins, combined with a smaller misregistration of 2 of the other colors.

If any color of the stamp was double printed, I would first look at the edges of the stamp rather than just the design elements. Any color double printed shows up more clearly near the stamp border where it can be isolated on a white paper background, and then you can check to see if there is a normal design element and a separate doubling of that color. All I see is a shift of color, not a doubling of any particular color or group of colors. But then again, I'm looking at a pic, not the actual stamp in hand.

I would not suggest trying to remove the top selvedge/tab to uncover the underlying. You might end up tearing off the underlying number, and if you use fluid, you might end up damaging the gum. That should be left for an expertizer, if you believe you have a double printing.

I don't see any evidence of double printing, only evidence of color misregistration. But that's just my non-expert opinion. I am open to any comments to show the booklet was double print.

I always welcome differing opinions. I want to learn, too! And others will notice things that I miss -- like forgetting about the 2 tabs!