Dave, you may have already seen this anvil, it was on FB marketplace last year at the trailer doctor in New Winchester. He said a couple of very knowledgeable guys looked at it. At the time he wanted a lot for it. I grabbed it when he lowered the price. Gary
Dave, it certainly does have the shape of an Arm & Hammer by the look of some photos out there. The possible marking of "warranted" on the side is on a few anvil brands.