I went digging since the ground had finally thawed out- and was rewarded with some keepers! Some staff buttons, an eagle, and civilian flower button and a pristine 1863 fatty indian! The 16mm GS eagle with a skinny shield turns out to be made by Steele and Johnson Ca. 1860. Seems like a rare variant as I can only find one other example with this backmark and it is a C in the shield cavalry officers. Pretty happy with this little outing!