Unusual Crescent Adjustable Wrench

[REtoolguy]

I have an unusual Crescent Crestoloy Adjustable Wrench ( see picture) that I am looking for information on. The following is what I know:
Crescent Tool Co.
12" Adjustable Wrench
Markings (MADE IN USA PAT. PEND.)
Jamestown N.Y.
Date Code ? (K)

The unusual part is the section under the size adjust screw?

 

[Dumber than lumber]

Some kind of adjuster lock?
Lugnutts will know something.

 

[IMCA38]

So is the switch used to release the threads on the thumb screw to allow quick adjustment, or does it lock the thumb screw so it won’t work loose?

 

[REtoolguy]

It has something to do with the adjustment for sure; however, no locking function. Thanks for your reply.

 

[REtoolguy]

I fiddled with it a bit and it locks the adjustment screw and then releases it when you back off the slide switch back from the adjustment screw. Last issue does anyone know what this type of Adjustable Wrench is ?

 

[RTM]

It is a Crestolock model, available in 1961, maybe earlier

https://archive.org/details/CrescentToolCatalog35M1961/page/n3/mode/1up


Looks like it was answered in 2011, October 1958

https://www.garagejournal.com/forum/showthread.php?t=105643

 

[Oldtuleguy]

Neat wrench

 

[REtoolguy]

Thank you for the information. I hope I am able help you someday.
RERtoolguy (Rick)

 

[d42jeep]

Thank you for the information. I hope I am able help you someday.
RERtoolguy (Rick)

Your unique adjustable wrench would be a nice addition to the Crescent thread.
https://www.garagejournal.com/forum/showthread.php?t=470557
-Don

 

[humber2]

Locking models were offered in 3 sizes in the 59 Catalog.