These may, or may not, be farm equipment tools.  The boss on the large "T" is T & H, and on the small one is MF etc.

Implement wrenches or not, they are pretty cool!  They would have certainly followed me home.

Jim

The one on the right is making me think torch wrench....

Torch wrench? 

The bottom , if it has a square opening, would turn the gas bottle on and off, the 2 side wrenches would fit hoses or the coupling nuts between the torch head and body....They don't all look like the Airco wrench -P

Only a vague guess tho...

Rusty:

Pretty sharp call.  I just checked and the bottom opening is a small and square - just a skoch over 1/4", say 9/32".

From my cheat notes...

9/32 fits the old Linde bottles
3/8 fits the Airco;Liquid Air bottles, and Propane
3/16 fits Acytelene B (plumbers) tank

There are other sizes old really old stuff tho....

Nothing yet on the T & H T-wrench?

How big is the one on the left? Looks like it could be and older clean-out tool(for plumbing) or a valve shut of tool. Not for pressurized tanks.

The large T wrench is 11 3/8 inches long, and the end socket is 7/8 inches square.