Posted By:
Al C.risafulliFrom the article on detecting trimming in T206s available right here on 54:
"On the front of a T206, the top border of the card virtually always has a slight etching, appearing to be the top of a “roll” running across the card. This is present due to how the cards were cut at the factories. Oddly enough, even though these cards were printed in many different factories, they were all printed and cut very similarly, with the exception of American Beauties. American Beauties are much more narrow than the average T206.
The aforementioned roll can be difficult to spot without magnification. The “roll” should be seen on one of the side edges as well as the top or bottom edge. If this roll or etching is not present on the top edge and either the left or right edge, there is an excellent chance your card has been trimmed"
-Al
edited for clarity