Very nice Breck.
The problem is that makers could, and did, mark barrels with whatever name they chose. Greener and others stated that quality horseshoe stubs were increasingly difficult to obtain after the mid-1800s.
So the pattern needs to be named based on the appearance.
The mixed iron and steel was "puddled" (partially melted) creating a "bloom of iron" before being rolled into rods, so the contrast between the components is less distinct
https://docs.google.com/document/d/1...LxMESM3W0/edit
Threaded Mode