As Defined by
The Philadelphia Print Shop.

An original print is one printed from a matrix on which the design was created by hand and issued as part of the original publishing venture or as part of a connected, subsequent publishing venture. For fine art prints the criteria used is more strict. A fine art print is original only if the artist both conceived and had a direct hand in the production of the print. An original print should be distinguished from a reproduction, which is produced photo-mechanically, and from a restrike, which is produced as part of a later, unconnected publishing venture.