I collect Roman coins. In this areas of numismatics cracked flans are common.
The
Peace dollar here has all of those characteristics that you see with cracked flans in Roman coins.
I would guess the reasons for the cracking compared with Roman coins are quite different, however.
In the case of the
Peace dollar, I guess that the crack is a symptomatic of a foreign (liquid?) inclusion in the area of the crack. The liquid has long since dissapeared.
A vertical, rather than a horizontal lamination.
Interesting and unusual error for a modern coin.