Mark. In dealings on the New York Stock Exchange four reichsmarks (marks) is counted as $1.
The actual value of four marks is 95.2 cents; the quotable equivalent of 100 in marks, therefore,
95 1-4. The value of 1 German mark is 23.82 cents.  The term mark also is applied to the X which
a person who cannot write uses as a signature. For additional information see Signing by mark.