ResearchPress
45 Cal.
The packers rolled the caps up into brown paper parcels of 25 caps each. Three of these packs were then wrapped into a single parcel of 75 caps, the regulation number served to each soldier with 60 cartridges at the time. Pictured is an original pack of caps, the wrapper carrying the marking CAPS 75. DEC./58 - The three individual packs of 25 can be seen with the outer wrapper.
From late 1858 each soldier was allotted twenty of Eley’s waterproof caps in addition to 75 of the Ordnance variety (I’m not sure how long this practice continued for).
For more information see - Military Percussion Caps
David