The joys of minutia: Jacob Lyman and the "hardluck regiment"

We found this marker while wandering around a church yard in York County, PA. I wondered why "Herman's Co." was inscribed, instead of the usual company lettering. Was Herman's Company famous for some heroic deed? First I looked into the regimental history of the 103rd PA Regiment. It's a pretty awful tale: mauled at the Seven Days in 1862, and then 2 years later, captured at the battle of Plymouth NC, with most of the survivors perishing at Andersonville, the 103rd was truly a hardluck story. Heck, these guys almost starved to death while training in Kittanning!
But I still couldn't find anything about Herman's Company. Finally, I found a roster that explained the writing on the wall. Herman's Company was Company D. Why wasn't it written on the stone? Because the 103rd had two Company D's; the original Company D, and a replacement Company D, sent in 1865. Happily, our man, Jacob Lyman, was in the second company and never went through the terrible ordeal that consumed most of the original 103rd.