Y1221 Patented .54 Hunt and Jennings Self Propelled "Rocket Ball" Cartridge (Patent#5,701 / August 10, 1848)
Description: Here is a hard to find cartridge. The base on this example is not swollen that badly. As you can see, this one is excellent condition and still retains a readable "PATENT 1848" on the side. This cartridge was patented by Walter Hunt in 1848. The powder is encapsulated behind the cork on the base. This is the longer variant. It appears the cork was replaced at some point. If the cork wasn't replaced on this example it would be a $450.00-$500.00 cartridge.
Measures: D .551" L 1.016"
Reference: RBTRF Vol. 3 No. 1045/1046