History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c14.s3.15

v1.c14.s3.15

The fact that the reverse type on numerous die-struck coins is found double-struck and/or partly out of flan does not at least indicate a regular use of any mechanical instrument (like a hinge connecting the two dies)¹³ to keep the upper die in proper place during the time of minting. Nevertheless, a regular alignment of the obverse and reverse impressions on a great number of coins suggests that care was at least sometimes taken before striking to put the upper and lower devices parallel to each other.