1973 LMC With Rotated Die Reverse

when they get past what degree do they become more valuable?

Individual preference needs to be taken into account. At 20°, I'd trade for a cup of coffee, so some value over face there. Some say 30°, others prefer 45° - 90°.

Thing to keep in mind is the coins orientation properly represented. As seen with the obverse image the alignment is approximately 2° off CCW. I have to ask myself does that apply to the reverse image as well?

An image with a mirror background is handy to show both sides direction of rotation. That said converting it to an accurate ° of rotation can be slightly misleading with the mirrors perspective.

The coin needs to show a static reference to both sides to ensure an accurate coin flip is present. Using a 2x2 coin flip with markers works pretty good. Markers mean an indication on the 2x2. Using a dot or line on one side and a corresponding dot or line opposite it on the other. Staples also make good markers when aligned differently.

Also note when a coin is aligned perfectly in a 2x2, the four corners generally represent 45° or 135°. Thanks, Doug.

Adding:


I like the computer for aiding image rotation. I use Photoshop to rotate as needed.

For coin in hand see the following image. Might save or print as a reference.

http://rotateddies.50webs.com/meas.htm