I collect stamping tools, about 800 to date, the older craftool that just say craftool co. And a # without a letter in front of the # are the best ones under the craftool name, then comes the ones stamped the same except there is # and letter. You will also find some withou # or letter. Most all of these are good stamps, they are earlier stamps made in USA. After that they are stamped craftool co. USA, these are as a whole good stamps also. In 1999 all there stamps were being imported and from then to date you are not getting the quality they use to be. If you want good quality stamps get the USA made ones or better yet buy Barry King, Robert Beard, Hackbarth, Clay Miller and a few other custom made stamps! They are more money but the difference in the quality and crispness of the stamps are undeniable. Hope this helps! Rodney