Scott 613 Reasonable Approach?

Hi all
Can anyone advise if what I am doing is a reasonable way of determining the difference?
Both perf 11
Thanks

The designs of the two stamps are exactly the same size, your image above does not have them lined up properly.
Don

Edit: As far as the method used (digital compare), you would have to be very careful and be aware of a number of factors.

First, use only high-resolution scans not photos). Make sure stamps are flat on the platen and scan both in a single scan. Ideally scan the stamps aligned above and below each other (not side by side) and in the middle of the platen. (Flatbed scanners typically use a single CCD and a lens to reach the outer areas of the glass. This introduces dimensional distortions towards the sides of the glass.) Use a good graphics app and a layer approach to overlay one stamp design over the other. Set the overlaid layer to a transparency level of about 55%-60%.

Always start with the assumption that you do not have a rarity; starting thinking that you have a rarity can influence your discovery process (called 'confirmation bias')

Don
Probably right re not aligned.
My eyes aren't what they were.
The question was about the approach.
If they were aligned and there was a small difference- is it worth investigation?
I understand the 613 is wider or higher?
Thanks

Don
When I enlarge the 3rd post
The right top side appears aligned
The right side shows a difference

Thanks Don
Amazing stuff

The stamp image is slightly skewed. Using your second image (side by side) the stamp on right is a bit distorted. Perhaps it has a slight curl?

But nonetheless, using a digital compare is feasible IF you follow what I wrote above. I can do it pretty quickly but others would probably find that scanning the stamps and doing the digital compare takes more time than it is worth. Simply cutting yourself a template is far faster and probably more reliable. Template procedure is here
https://stampsmarter.org/learning/M...methods.html
Don

Thanks Don
Learning

I like that. Seen it here occasionally over the years.

More info on confirmation bias, it can impact us all.
https://www.verywellmind.com/what-i...bias-2795024
Don

Yes 610 and 613 are both perf 11, the difference being flat vs rotary. As an additional quick diagnostic, the flat plate printing will very likely have ink set-off on the back side. Thus looking at the reverse side is also useful.