Better pictures would be nice. But it looks like a Yamaha Pro series
Marks Props 317-398-9294, 1850 East 225 South, Shelbyville, Indiana 46176 propellerman59@gmail.com http://www.marksprops.com/index.html
It's the old m series. Yamaha just changed the name to the pro series. It's the exact same prop.
Do you still have the prop?
Yes