I'd like to know more about this tool. I have it on eBay but there is not much interest in it and I am considering donating it to the Glenn H. Curtiss Museum in Hammondsport.
This wrench with cast number "6713" came with another wrench - an "S" shaped Billings and Spencer circa 1880-1910. They were both stamped AWS - owners initials or a company/organization. The wrench size appears to be 1" at both ends.
I have spotted similar wrenches on the internet and eBay but they are posted with no information. Some of the wrenches were found by typing 6712 instead of the actual 6713 number.
There is almost no rust. The roughness seems to me to be part of the casting.
Thanks
Al
UPDATE: The auctions ended and I did not relist. I am not 100% sure but may donate to the Curtiss Museum if they want them. Here's a photo of the "S" wrench (Billings & Spencer #74)( 1" x 1 1/8"):