Saw a 885uh on the ebay being advertised as made in Walden, N.Y., but reads as a regular Schrade-N.Y. USA 885. The other two blades have UH on them. How can you tell which factory these came from? It does look like a older knife, but does not say Walden on tang. So, is it only a Schrade-Walden if marked as such, or is there a time they were marked Schrade, but produced in Walden N.Y.,or is this Schrade Cutlery Co.? So much to know, seems every year these changed something. But they are great knives! Thanks for your help-uhman