It looks like a Bobcat - the side cutting edge looks the same as the 12" wide bucket on my pictures.  That cutting edge looks like a flat edge bolt on one so didn't want to spend a lot of money and still be able to cut into hard dirt, use a cutting torch and make a few "teeth" edges on the blade.  I like my smooth edge 36" grading bucket to do grading work.  I bought a used tilting attachment that works nice on the 36" unit.
I had a 8 yard Ashland scraper with a wore out smooth cutting edge, when I bought a new edge, I got the serrated type edge, really cuts nice.