The 'old standards' of 'adjustable wrenches' were the Crescent 'Crestoloy', the 'Diamond Calk Horseshoe Co. 'Diamalloy', the Williams, and the Danielson pattern.
The Danielson works, which was bought out by the Plomb Co. in the late 1940's, made the best grade, in terms of convenience in use, with slightly thinner jaws and generally better moving parts fitup. The Danielson pattern adjustable wrenches are otherwise much the same as the other makes, to be sure, and may be found marked as Danielson, Plomb, Proto, Herbrand, and a couple of other 'brand names', made on contract for various other lines of tooling.
The 'Diamond' pattern, nearly identical to the 'Crescent' pattern, was also sold by Snap-on, marked 'Blue-Point', and also under other 'brand names' made on contract.
In practical use, any of the 'Crescent wrench' style, as made by the better makers, are functionally identical, and there is little, if any, actual reason to prefer one make over another.
The older versions of the Swedish-made 'Bahco' wrenches were some of the best adjustable wrenches ever built, but they weren't sold in this country, and are not easy to find.....the current 'Bahco' brand is not the same. A good example of the older style are often found marked 'Volvo', as Volvo car maintenence tools.
Unfortunately, several makers in later years have chosen to re-design the common Crescent pattern for use of lower grade steel, resulting in cheaper, clumsier wrenches, which are less convenient to use.
Adjustable wrenches, or 'shifting-spanners' will be with us always, as they are the 'convenient tool', but its really prudent to minimise the use of them, if at all possible, in favour of the socket or box-end 'ring-spanner' class of wrenches, as the obvious workplace safety issue.
cheers
Carla