5.75x6-7/8" certificate has classic image of Superman breaking chains. Issued by Swan's Bread in 1941 to promote national defense and the Junior Defense League of America. Typed name appears on provided lines. Folded once as mailed. Certificate has lightest trace of wear and some minor indents and three pinholes by address line. Some scattered lt. staining along top and bottom margins from glue on reverse from scrapbook mounting. Still very clean and Fine. Only four certificates are known to exist. Rarest of all Superman certificates. The last example we offered (w/envelope) sold for $2,656. This is the actual example shown in the Hake's Pop Culture Guide.