From the archives of the Johnson National Insignia Company of New York, this listing is for an antique steel stamping die used to make a Fraternity Pin for Sigma Pi Mu.  This is an antique die that probably dates to the 1920-1930s period.   The octagonal die has dimensions 1 ½” x 1 ½” and stands 1 ⅝” high.  The die weighs 14 oz and the condition is Excellent.  Please look at all the photos and ask any questions.  See my other listings.  Free shipping is included for USA buyers.