Bruce, Your info. about Lawrenceville led me to find out that Iron City forge was first established by German immigrants in the Pittsburgh area around 1859. They became Kloman & Co. in 1862, and during the civil war the business boomed and ended up merging with a company owned by Carnegie (of Carnegie Steel fame). I'm still not sure when my pickaxe head may have been manufactured, so any further info. that someone might have would be appreciated. Thanks!