Winchester No. 12 ?

went to an auction/fleamarket today. One of my finds was a box of 9 brass shells marked Winchester No. 12. Look to be 12 Ga. and about 2.5 inches high. 2 have intact primers and all have a rolled "crimp" on the open end. Several have paper or cardboard wads inside (loose, I could get them out with a pair of needlenose pliers), None of the shells have any powder or shot. The primer looks to be different from normal (period) shotshells.

Now for my questions. I assume these are "black powder" shells? Can these be reloaded with smokeless? What primer do I use? I have some of the old cast iron implements to roll the crimp and about a 100 of the cardboard wads.