Found this behind where an old blacksmith shop used to be in the late 1800/early 1900's. Measures 9" x 6" x 1-1/4" wide (roughly 3/8" thick). Could it be from an old carriage? Any help greatly appreciated.
I have restored a couple of old buggies/carriages. Though the parts vary widely depending on style, and region, those DO look like the suports used to hold the sides onto the floor. Your guess is a very good possibility!
It's not a 90 degree angle (wish I could get better pics to show the bend cause it does look that way).
Bends back at about 70 degrees and sideways about 15 degrees.