The nice thing about the Walco pipe wrenches is that both the body and the jaw of the wrenches have date codes. I can make out the 4 but can‘t quite make out the second number on yours. Yours also has the jaw tensioning spring in place that is often missing. Here are the Walcos in my WW2 keeper sets.Walworth Company Walco Pipe Wrench 10 Inch Heavy Duty
Whether Johan Petter Johansson or Daniel Stillson actually invented the Stillson type wrench it seems Walworth employed bright, inventive people as Alphonse O. Brungardt, also employed by Walworth, invented an upgrade of the Stillson in 1932, patent number 1,862,002. “The object of the invention is to provide a forged wrench of exceptional strength and durability having relatively few parts; one which is of relatively light weight . . .”
This Walco has a removable jaw which according to information from Private Lugnutz vast store of rusty information would make it “heavy duty”. Can't say how much stronger or durable it might be, but it has lasted this long.



I've had the 10-inch model for a few years now. Not in very good condition and I could barely make out the /G\T/D\ logo. This morning I found an 8-incher at the flea to go with big brother, and it's in much better condition. See Pics below.Weird 4 way design.


They were made and sold by a company called Schick Products, Inc, in Belmont, CA., in the late 50's and 60's. You may see wildly assured but apocryphal references to the iconic razor company (people seem to want to put the name and the aluminum together...), but there is absolutely no connection. I got into an double argument with someone about these once (person also claimed they were wartime!) and ran everything to ground. I'll post it after dinner if you'd like. They do have a bit of a cultish following (the first to go light weight, before RIDGID and others tried it...) and I wouldn't mind running into one in the wild. Nice friend! Yours look like they have the beryllium-copper jaws, which was an option....this early aluminum pipe wrench was a brand that I haven’t run across before.




Made by Erie. More than you will ever want to know on that subject here.And the Craftsman.
Quite an effort by y'all.Made by Erie. More than you will ever want to know on that subject here.
d42jeep said:"...the ubiquitous asterisk..."

Love the Brass and copper!
It’s really hard to date Walworth Stillson wrenches because they were made for so long. I have run across a couple of wartime examples that had date codes on the movable jaws but they are the exception rather than the rule.
-Don"