Blow. The stroke of a press; a strike. Coins are struck with a single blow; proof coins are often struck with two blows (called double struck); high-relief medals are usually struck several blows (multiple struck).
excerpted with permission from
An Encyclopedia of Coin and Medal Technology
For Artists, Makers, Collectors and Curators
COMPILED AND WRITTEN BY D. WAYNE JOHNSON
Roger W. Burdette, Editor