Photographs would help. New or old makes a big difference. And value is what people pay, so best bet is to surf net for same blades of same vintage and condition, and see what folk are paying. Ones made while Rudy still helping, even if not at forge, are worth the premium, and feature the earlier stamp,

To help in search, top stamp is Rudy era, bottom stamp is post-Rudy era. Newer knives have defined grinds.

Of course, the easy way might be ask father in law.



if new-new, the Ruana Knives site lists new prices, if site finished updating.