Willeboy,
As a matter of fact, I do. Most ninjas hade 4" by 1" blades of 440c, and were semi hollow-ground. Some were machined, some hand-ground.
Occasionally, the blades were made of sandvik 13c-26 swedish hi-carbon steel.
The handles had the most variations. Some were of a soft lexon, some a hard lexon. Some were Dupont Rynite fibreglass-filled polyester.
I have maybe a dozen of them, in a couple of grinds and finishes. I also have a couple of the double edged version, called the moray. One of them was owned and carried by Colonel Rex Applegate.
I do love my Ninjas.