Homestead valve wrenches maybe?

[skylab]

any ideas?
Homestead Valve Co?
I may look for other sizes.

[Papaw]

Probably right- for gas valves or welding bottles.

[rusty]

Homestead Valve co of Pittsburg,PA is mentioned in Steam engineering around the 1920's
There are also references in 1902 of them building a brass foundry, and of them making 2-way and 3 way valves, and they are mentioned in Railway Gazette...for 'blowoff valves' (pressure relief valves for boilers) so I suspect they were primarily making steam valves.

[gibsontool]

Depending on the opening size, they could well be for acetylene or mapp gas cyinders, some manufacturers provided a round handle on the valve stem but some of the companies just left the square valve stem sticking straight up and you had to use a wrench similar to what you are showing here to open the valve. The stems were usually 1/4'' or 5/16'. The wrenches tended to get lost quite often and the general practise was to use an cresent style  wrench and the pointed end of a spud wrench thru the hole in the end of the cresent to get enough leverage to open and close the valve