[beemor]

seamon anvil

Actually it isn't a hammer even though it needs a handle it's a lead seaming anvil...
Sheets of lead are edge folded together similar to a snap lock seam...
The operator then slides this tool down the seam while pounding on it with a 3 to 5 pound hammer...
the handle facilitates holding it in place during striking... faster to operate one with a handle than the type w/o one.... Very fast...
Haven't used one of those since the late 50's early 60's...

So what would the " ? /8 " mean? Did they come in different size profiles?