We have a Rubber Jewelry Mold Black and gray. This was used with pewter to make pendants.  It measures about 9" across with the center hole being about 1 1/4" across the center x about 5/8" in thickness.  It has suns with faces all around.  It does show some wear from use and age as shown in the my photo's (a bit of discoloration on the black)  There are marks on the back as well as the # written and "Express".  It is in overall good condition.

Rubber Jewelry Mold Black and gray