Hi Frenchie,
I took these two photos and included information from the Roy M. Marcot book,
Spencer Repeating Firearms.
Spencer Cavalry Cartridge Box
Weight 15 ounces empty; when filled with 20 56-50 rimfire cartridges weight was 2 pounds, 7 ounces. The 20 hole box has a leather pouch that measures 6" wide x 2" high; the pouch was designed to hold a Spencer screwdriver (as above), cleaning patches, leather thong and brush for cleaning the bore.
Spencer Cavalry Pouch
The inner pouch held six packets of Spencer 56-50 rimfire cartridges; the smaller implement pocket pouch held cleaning patches, the leather thong and brush and screwdriver.
There were several other variations of the Blakeslee "Quickloader", the Howlett Cartridge Box,
the Bryan & Bigelow Cartridge Box, and the Schneider Cartridge Box. Each of these cylindrical loading devices had two glaring negatives which prevented the Ordinance Department from considering their adoption for military use - each, when loaded, was very heavy, and they would jam very easily, because of their very intricate internal mechanism.
Howlett Cartridge Box (drawing only)
Bryan & Bigelow Cartridge Box
Schneider Cartridge Box
Two Flints