Dating scovill buttons
Pictured below is the back of a button dug near Antietam, so badly corroded that the face of the button disintegrated when it was dug, exposing the inside of the back that was protected all those years.
It exposed a very rare “Goldsboro Rifles” backmark known to exist on a rare North Carolina button.
There are many different backmarks for US Navy buttons dating from the 1850’s and 1860’s, as well as many post-Civil War backmarks.
Here are some of those - with examples, all buttons pictured are from my collection.
I am using many references to Albert’s button book, probably the best resource for US military uniform buttons.
There were many different manufacturers, and different backmarks made by the same manufacturers due to different dies or special backmarks for a customer (with their name or company).
Many were American manufacturers; there were also several British and a few French manufacturers as well.