Nicaragua #1? (Compared To #4)

I have just acquired an early Nicaraguan album page, and found these two stamps. Scott describes #1 as dark blue, and #4 as blue. Can I assume the first stamp is a #1? Is there another indicator besides color?
thank you in advance for your help.

Nicaragua Scott #1 is narrower by half a mm, measuring 18-1/2mm wide. So, the left stamp looks like it's it -- please measure for yourself. Most #1s exist without gum; how about this one?

Actually, both stamps measure 18.5 mm wide. And both have gum.
Perhaps both are #1?

Re-touched on the tree?
It's Just a guess (I know nothing of these stamps)
Could just be the way it looks on my screen

Also found this

Really? I am assuming that both stamps were scanned together. There is no trickery done below. I have just overlaid half the left stamp on the right one. Lay one actual stamp over the other and check for yourself that they are not the same size:



Just fella, blurry images of different sizes does not convince. Plus, how do you know that specific positions of either issue were or were not retouched?

Agreed blurry images don't convince!
Nether do question marks :)
As I pointed out I don't know these stamps
I took a look at the stamps posted and that's what I see
(pointed out could lead to a specific retouched position and a positive ID
For future references)
Isn't that part of this wonderful hobby?

These two pages from the Maxwell handbook, digital edition of 2020, should help.

Please let me know if you spot an error.

The Maxwell handbook is free to all members of the Nicaragua Study Group.

The Nicaragua Study Group decided not to sign an agreement with Scott to use its catalog numbers, so the Maxwell handbook does not include Scott catalog numbers. It does include Gibbons numbers with the permission of Stanley Gibbons Ltd.

For the two Maxwell handbook pages I attached, it is not difficult to figure out what the Scott numbers are.

Both your stamps are the number 4 in Scott's just different shades .

Here are the two different stamps ,one on yellow/buff paper and the two on white paper from my collection .

My observation
Could be the images by the time they hit my screen