I'm familiar with the name but don't know much about collectibility are these collectible knives? Thanks..........
banjo

Ralph was a custom Maker in the 60's, 70's, and early 80's. He sold his knife making business if I remember in 1082 and went into full time Engraving, where he became very well know as well. Ralph was my Engraving Instructor at GRS in Kansas.
Curtis Wilson