Hi. The forum stopped providing email forwarding after the site upgrade. I'm sorry to hear about the passing of your grandfather. It sounds like you've done some research on the knife. Here's a scan from a 1972 Sears catalog showing the knife. It may also be of interest that around 1972 was the last of the Ulster brand name. The Ellenville plant continued to be used by Imperial Knife Associated Companies, Inc. Some of the guys in the Schrade collector forum may have more info about your knife.