If you are into history, then Plomb has an interesting one.
Alphonse started his company in 1907, but could not register the name because Plumb (the hammer company) was already in business.
Alphonse left around 1916-1917 to start a second company. A. Plomb Tool Company. Tools were marked A. Plomb. His second company was sold to California Tool Company in 1927, which marked tools Calif-Tools, but sometimes also had A. Plomb on them.
Plumb sued Plomb in 1946. It has been said because Plomb came out with a hammer. If this is true I would like to know what kind of hammer, because Plomb had hammers for a long time, but they may have been just body hammers. The Stanley-Proto site says it was a ball peen hammer.
So Plomb started to change its name 1948-1949 to Proto. That is why the dual marked tools are hard to find, since production was only a short time.
I would love to get one of these boxes but they are too expensive.