Manufactured by Steve Cormack, the 3/4 inch polyester resin die has rounded corners and weighs 12.8 grams.  The outer shell is continuous, with no seam.  A lead weight is hidden below the surface of the die.  When rolled, about 65% of the time, it will stop rolling with the weight lowermost, and your desired number uppermost. 
 
Excellent condition.
 
Please indicate your choice of 1 or 6 uppermost.