The following is the first of 2 known half dollar sized designs. This one employs a seated Liberty design similar to the regular circulation piece inside a scallop design with a reverse showing an eagle, again similar to the regular design inside a scallop design with Chormann F below the eagle.
So far this is only known in white metal and/or lead with at least 2 known, one ex Ford, StacksBowers 8/13 sale and another ex Heritage 8/06 sale.
We have saved JC1861-16 should a silver example ever turn up.
Photo courtesy of StacksBowers.