I have taken the liberty of posting your image and description, Herr Jim.
HEEL PLATES: These heel plates are typical of those found in areas visited by the Union armies in Virginia. These were found in a 2nd Corps trench at Cold Harbor. They are the most common style but other varients do exist. Each heel plate shown here was held on by three nails. Heel plates are not recovered in any quantity from Confederate positions. A study of photographs showing dead Confederates at Antietam, Gettysburg and Petersburg do not show a single heel plate however several hob nailed shoes are evident in the Gettysburg photos.
These are quiet similar to several I once examined from the Wilderness area.
In gleichem Schritt und Tritt, Curt Schmidt
Not a real Civil War reenactor, I only portray one on boards and fora.
I do not portray a Civil War soldier, I merely interpret one.