Thomas Conroy via OldTools wrote:

> Some of the older leatherworking books have designs for shop-made stamps, and
suggested patterns for combining them. If you can find a copy of John W. Dean's
"Leathercraft: Techniques and Designs" (Bloomington: McKnight and McKnight,
1950) there is a particularly good section on shopmade stamps on pp. 60-65.

Or read Moxon on making type - the filing of punches, (and counter punches)
has tremendous overlap with the stamps being discussed.

  BugBear