Airmail Oddity? Extra Yellow Ink On 2006 63c Bryce Canyon #c139 Block Of 10

There is a yellow dot in the stamp's margin.


At first I saw the one yellow dot and was like what got my stamp and how, but then I found others.

And other yellow dot in the selvage along the same vertical line.


That is two yellow dots on the same line. I also have another block of 10 that has yellow dots in the same 2 spots. Is this a printing mistake? I think it is an oddity because of the extra ink. How does that affect the value negatively or positively?

Full Block of 10:

ggreve, interesting. Your picture ( scan? ) is unclear and out of focus.

Peter

Sorry for being out of focus, I took a quick picture. If a scan would be better, I can do that.

Thank you for your reply. Took the time to scan them in. Hopefully that helps.

Crop with 4 arrows pointing to yellow markings.


Full scan:


Thoughts?

It would probably fall into the errors, freaks and oddities. Unless there is a specific plate flaw which made the dots constant after the damage occurred, it's not going to make it as a variety. I'm sure there are some collectors who would find a place in their collections for these stamps, but it is not likely to be a huge value increase for them.