I was cleaning out an old shed and found a box with old shotgun shells and a few rifle rounds in it. my ? is on the rifle rounds. 1 is stamped W C C 5 5. 1 stamped PETERS 30G1906. 1 stamped T W 5 3. There are a dozen 12ga shells stamped SEARS 12 GA XTRA-RANGE. Anybody know what these go to and possible age on the 12ga shells?