Design patent # 4099 by L. Kreuzinger.  Shown as "Medallion Pattern, Lady" in 1875 Russell & Erwin catalog page 383,  2 1/4  inches in diameter, $5/pair 2 1/2 inches in diameter $6/pair.  Exquisite detail, flawlessly done. Also in 1882 catalog page 299. Click on each photo below to view additional images and information.