Period correct '74 Sharps Buffalo Rifles?

[John]

Okay, on close examination I've found a raised disk in the center of the brass, may cover 90+% of the total face area, under a magnifying glass I was able to catch a bit of the edge of the raised portion, it now mics between 67 and 68 thou, better I guess.

Sorry for all the rudimentary posts, but, it may help someone else with getting a 44-77 up and running, much like you men are helping me.

Was this the brass from TOW? What’s the headstamp?