Good day.  I ran across an anvil for sale but this Peter Wright Anvil looks like it has the back chopped off and a rectangular hold cut in the side of the face.   Is this an original looking anvil, just a different type than I'm used to seeing or did someone just cut it up for their use?

It's a large one, the numbers say 3.3.4

 

Looks a lot like the Fishers used for Blacker power hammers, I wonder if they ever used PW's??

Here are 2 more pictures.   

I'm with Thomas, looks like a Blacker power hammer anvil. Should weigh 424 US pounds give or take a little.

I passed on this auction, it went for $2,000 CDN.  Thanks for the input.   Although it was modified to fit a power hammer, it still would have been a big heavy beast to work on.

I don't think it was modified; I think it was manufactured that way to begin with!  Back when anvils were "hand" made; you could order special designs.  A lot like you can order a vehicle with a larger engine and a towing package right from the factory nowadays.