I was just doing some scanning for this post last night and swear I've put the coins perfectly right side up according to the reverse when I was trying to scan the obverse. Turned out my scanned images were still rotated. Which brings me to my question: what's the best way to measure the degrees in which the die axis were rotated? In the perfect world the die axis would either be medal (both sides upright) or coinage (upright points to opposite end on the reverse and obverse, like in US coinage). (Actually I disklike coinage die axis, and in the perfect world only medal die axis would exist ) I know for Canadian coins the rotated axis less than 15º has not much numismatic value. What about in general? If this occur on a MS-70 coin does it lower its grade? Thanks,
It's nothing but a rule of thumb - but many think 35 degrees off axis is a desired minimum. Technically speaking, this type of error should not affect the grade one way or the other.
Thanks. I ask this because I have also a set of specimen coins that is framed in this flip case that allow display of both sides. The reverses are fitted perfectly straight and aligned on one side and when I flip the page over some of the obverses are rotated. I was so tempted to ply open the case to straighten them until I realised the die axis was rotated.
