Size
Date
Country
Artist
Sitter
Case
Mark

1/6
ca 1847-1850
USA
Unknown
Unknown
Full case, thermoplastic
"L. B. Binsse & Co NY, 40"

Notes

"Littlefield, Parsons & Co. are the sole proprietors and only legal manufacturers of Union Cases with the embracing riveted hinge, patented October 14, 1856 and April 21, 1857."

The case and preserver have been added later, after 1858.