Picked this up recently at a yard sale. I've never seen one like it before and was wondering if anyone else has. There is no name or any other writing on it.
All metal braces are generally used by carriage makers, and referred to as carriage makers braces. The general carpenters brace at these times were made entirely of wood. Carriage makers worked around a carriage as they built it, and a wood brace was easily stepped on and broken.
This brace is much beefier than the carriage maker braces I have seen, and I suspect it was a blacksmiths brace. The robustness of the brace is very much like the beam braces used by smiths.