I metal detect an old wagon trail, and have found really old objects. Some date to Conquistador days. I am looking for info of maker, type, and age of the C.D.L. shell.
Probably a Spencer so US Civil war or later. The other two are post 1900
CDL is C. D. Leet, Springfield Mass, 1862-1867 (Cartridge Headstamp Guide by White & Munhall).