Fiddling with them this morning, the Bahco has least backlash, the Elora most - tho I have no idea how much use they've had over the years, so it tells us nothing about how they were when new. I'd really like to be able to date them but they don't seem to have marking to help with that.
I found this summary of the adjustable, including reference to Bahco and Crescent, on Wikipedia:
"One of the most widely known forms of adjustable wrench in the 21st century is an improved version of the Clyburn type; it was developed in 1891–1892. The Swedish company
Bahco attributes its invention to
Johan Petter Johansson,
[9][10] who in 1892 received a Swedish
patent for it.
[11][12] In Canada and the United States, this type is often known as a Crescent wrench owing to widespread
genericization of the brand name
[13] of the company that held the original 1915 U.S. patent for this type (
U.S. patent 1133236A), the Crescent Tool Company. (The
Crescent brand is now owned by the
Apex Tool Group). As Geesin 2015 documents,
[4] the worm-on-rack type (regardless of which terminology is used to name it) was invented in Britain,
[4] and later popularized in Scandinavia via the Bahco/Johansson improvement, before its manufacture in the United States was patented."
And this odd little film has more on Crescent (you get used to the voice-over after a while!):