No way of ever getting a positive ID on your old knife. It is an easy-open jack, a common pattern made by many companies. The shield is called a propeller shield, and again, used by many companies. Old guys did not just sharpen their knives on bricks or concrete, only the old fools did so. My father, uncles, and grandfathers only sharpened their knives on proper whetstones. There are many old knives that show abuse and many which don't. Walden was home to a lot of great knife companies but they were not necessarily related.