Barry,
I have enclosed a picture of standard Hurd blanks with their corresponding Curtis (H code) and ILCO (1125 series codes) written as notes. Also be aware that the H series are backwardly compatible blanks (from H11 back to H2) for cutting on your Mod #14 cutter (uses the H carriage for all; NH depth cutter for all after 1936, FH, FJ, FK codes forward; HCZ depth cutter for all before 1936, FB, FC, FD). You can sometimes still find these old obsolete blanks at old locksmith shops. I pick them up every time I see them. I have them available for purchase as well. Also going to be at the Charlotte AutoFair this next week for lock/key consultation and sales. Look me up if you are coming, Blue Field space BBB-093. Hope this helps.
Regards,
John McClure