Sensenich Des76B1

[ut100]

I've got a Sensenich propeller with "DES76B1 ser 7187 HP 50 RPM 1900" stamped on it, I can't seem to find any information online about its' age or application. I found the propellor back in the late '70's in an attic above shop class in highschool and was wondering what it might be worth.

[MWP_Lamar]

It's not a 76B51 by chance is it? There should be a two digit number after the middle letter.

Lamar