I recall that in some states, you were allowed to use two different size seals, a bigger "desk seal" for large blueprints and a smaller ones for calculations, etc. So the first step is to see if the size of the thing matches current seal requirements.
I bought a crimp-type seal several years back. I would guess that the manufacturers of these can only furnish the one style of die- if that's what fits your old embosser, great, otherwise, not so good. If I remember right, on my embosser, one surface is metal, the other is a softer rubber or silicone.
The only application I have heard of for this type of seal is some PE's on the east coast having trouble with people forging seals, etc., and this was one way to make it harder. Otherwise, everything normally gets rubber-stamped or CAD printed for easier photocopying.
