I have exactly one Blue Point adjustable wrench and it has the same K on it.

The wrench belonged to my grandfather and he gave it to me in about 1989. It was not even close to being new then. He was a farmer that lived in a small, rural town. Can’t imagine where he got it—the town hardware store most likely. I wouldn’t take a million dollars for it.
My wrench
I have exactly one Blue Point adjustable wrench and it has the same K on it.

The wrench belonged to my grandfather and he gave it to me in about 1989. It was not even close to being new then. He was a farmer that lived in a small, rural town. Can’t imagine where he got it—the town hardware store most likely. I wouldn’t take a million dollars for it.
Yep, a keeper for sure. Mine is 1974, bought right off the Snap-On truck. *** Our grandfather handed down his 24” DIAMOND Crescent-Style wrench to my Dad, then it came to my brother. He wants to chrome-plate it..,
My brother and I ended up with many of our Dad’s PROTO, Bonney, Snap-On and Channellock tools, many of which have “MCB” scribed on them. These are being split and passed down to our kids.
My sons will not forget the MCB importance, nor the value of understanding how to use a CRESCENT wrench (or Diamond, JP Danielson, JH Williams). I took liberty and collected a few of each for them, and told them a little history about the companies, some of which are now gone.
I hope someday someone will bring production of Crescent-style wrenches back to the USA.
At least Channellock, Estwing, and (some) Klein tools are.