I'm going to do some research on this now defunct plumbing tool company. I have a pair of their tools - they seem to be excellent quality.
Other than a short blip in the progress blog, I can find out virtually nothing about this company. No names of founders, no years of operation, no timeline of events, no catalogs, no advertisements, no patents that I can find, nothing. Other than the inscription on the spanner wrench (indicating Bedford, Ohio), there are no leads. But, I'm going to try and uncover whatever I can.
I just feel bothered that someone started a company, bought a forge and built a factory, and employed unknown men to make the tools. They are all long gone now and have been swallowed up by history, but some of the tools live on. Who designed these tools - who made these tools - who used these tools? I just feel like someone has to at least try and find out the what and who of the company. Maybe it'll be a dead-end, maybe not. But I'll give it my best shot.
As far as I've been able to determine (from ebay), Covers Company made only 3 styles of plumbing tools: a slip nut wrench, a 4-in-1 spanner, and some basin wrenches. (Perhaps others will become known if I check Pinterest and the like). I have the spanner wrench and a 10" long basin wrench. The slip nut wrench is neat in that it has a Crescent wrench type of spiral adjustment wheel for sizing along with a wing-style locking nut. Most other brands of slip nut wrenches have only the wing locking nut.
Here is the spanner. It was a bit rusty when I bought it, so, I wire brushed it and gave it a coat of hi-temp silver. It makes it look nice, should render some protection, yet if a purist wants to buy it the paint is easy to remove. I like the design - not being a plumber means I don't know all the fastener names and uses. But the fact that it's 4 tools in one meant that the company was trying to make a tool that would serve the professional plumber with multiple tasks.
And the basin wrench - untouched.