Jefferson Nickel Rotation obv/rev question?

This 1940 Jefferson Nickel has a minor rotation, about 5% I would guess. I have several in my collection that have a small amount of rotation obv/rev, but trying to get a handle on how to access the estimate. I know this small feature adds nothing to value, but just curious as how to determine rotation percentage at a glance without a compass.
Thanks,
Jim
When a man who is honestly mistaken hears the truth, he will either quit being mistaken or cease to be honest....Abraham Lincoln
Patriotism is supporting your country all the time, and your government when it deserves it.....Mark Twain
0
Comments
I printed one of these out then overlaid it with clear packing tape to make it durable so I can carry it in my wallet. I don't know if it could help with a slabbed coin though???
"When they can't find anything wrong with you, they create it!"
Well, it depends upon how good you are with spatial perception. Many people can look at a whole pie and imagine it being cut into six equal pieces. That gives you a 60 degree angle. Likewise most people can perceive a circle divided into eight equal pieces. That gives you a 45 degree angle.
Picture that wheel of eight spokes overlapping the coin you are studying, and reckon what fraction of that 45 degrees the die is turned. A third? 15 degrees. A bit less? 10.
Thank you Steven. Is it alright if I copy this and save it with a transparent background and print it on a cellophane page with all the different coin sizes? Would make it easier on a slab.
If ok, this is exactly what I needed.
Jim
When a man who is honestly mistaken hears the truth, he will either quit being mistaken or cease to be honest....Abraham Lincoln
Patriotism is supporting your country all the time, and your government when it deserves it.....Mark Twain
By all means go ahead..............
"When they can't find anything wrong with you, they create it!"
I would also have a piece of the transparent film to use as a straight edge
Thank you,
Jim
When a man who is honestly mistaken hears the truth, he will either quit being mistaken or cease to be honest....Abraham Lincoln
Patriotism is supporting your country all the time, and your government when it deserves it.....Mark Twain
Just a slight rotation... I would say (just visual estimate) between 5 and 10 degrees. Cheers, RickO