This cartridge box was tested at the trials of 1873.  It contains 3 rows of leather loops holding a total of 30 cartridges. 

Our specimen is marked on the bottom "JOSIAS.R.KING'S PAT. NOV.15.1870 W.M. TILESTON.ASSIGNEE" and "AGENTS SCHUYLER. HARTLEY & GRAHAM NEW YORK" and "58".