Another pile of junk I got at an auction...

Along with a bunch of chuck keys came about 20 of these
things packed with foam in three small parts boxes:

http://www3.sympatico.ca/doc/setofdies0.jpg
http://www3.sympatico.ca/doc/setofdies1.jpg
http://www3.sympatico.ca/doc/setofdies2.jpg

Most people thought they were cutters but they all have slightly
different face shapes (last pic) so I think they are parts for some
sort of die.

About 4 inches long. Look to be professionally made. They are marked
with numbers from 1 to about 52.The one that I took pics of also has
the number 3052263A-5391 reverse engraved on what might be the face
of the die.

Boxes have the numbers MX00751 marked in grease pencil.

Look to be expensive so I'd hate to just pitch them.

Can anyone help?

Tanks,

DOC