Yeah, That's a Belko Prop and that one is probably for the early 60. As stated before it's made of foam covered with carbon and Kevlar, very light and stiff. I doubt that it's very low pitch unless you've actually checked it on a gage. Most of them are 6 to 7 pitch as they are made for relatively low revving engines. I'd be interested in buying it if you're interested in selling. I have one of the 60's that I believe it was made for.
Randy Cuberly