The stamp says it was made in Elyria, Ohio and they moved there in 1943 (according to google),
In this case, Google is not yer friend. The Ridge Tool Co. website history timeline says it was founded in Elyria in 1923, but the same timeline also says they moved to Elyria in 1943, which is very confusing. It gets worse. Wiki says they were founded in N. Ridgeville in 1923 and relocated to Elyria in 1943. What my research seems to show is that they had an "office" (it may have just been a business address) in N. Ridgeville in 1923, and they used that as their business address, but the factory was always in Elyria and they merged them in Elyria in 1943. Regardless, no early pipe wrenches say anything but "Elyria" as far as I know. Look at the ads 4.c posted above. Elyria in 1931. Elyria in 1939. And all the tools are black. Red would not show up like that. And all the prewar wrenches that show up with any original paint or traces of original paint, it's black. Trust your eyes and instincts. Would a pipe vise originally red and
repainted black in the 50s or 60's already look like the traces of black paint on that vise? If you want to read more, consult the Ridgid thread. See the Sticky at the top of the forum this thread is located in (which is the Vintage Tool Discussion forum). There is an A-Z Index inside it. Go to Ridge. Click.