No crimp marks at all, but slight "swage" like marks on the bottom. I cannot remember ever seeing bullets of this type so presumably they are post Civil War. The ID at 50 caliber looks about right, but I did not have calipers with me.
I had a super fantastic visit to Terry and Carolyn's place today and after Carolyn graciously fed me, Terry also graciously took me to see the Pleasant Hill and Mansfield battlefields (& points in between) I did not have time to see last time. Talk about an expert tour -- WOW. Folks, you need to go there if at all possible.
One of us will try to post some pictures shortly. I do not have a card reader to upload my photos right now, but I think there is something for everyone.