Numberall (Sangerville, ME) has many choices for the Model 23P Type Holder: not just character size and capacity; Numberall can modify the Model 23P for just about any type of marking.
The image shows a hardened Model 23P with lines and female embossing characters. This is used on a Heat staking press, forming the end of a plastic tube (like toothpaste) and allowing the material to flow up into the female type, for a raised character date code. All of these products are made to suit special applications, and are always made in the USA.
www.numberall.com; 800-685-3072