They produced knives on contract for other companies, you will see old knives marked Press Button, Keen Kutter, and others. They had their own unique jigging pattern on the bone handles of their knives, so if you see an old knife with the same bone jigging as a Walden, chances are they made it for that company on contract. I have posted an example below to compare to.
By 1893 George Schrade was looking for a place to manufacture his patented Press Button switchblades. He found a place at Walden Knife Co. These knives were made in their factory until about 1903, when George Schrade sold his patent and interest to Walden Knife Co. They continued to manufacture lots of them, about 10,000 dozen Press Button switch blades a year! That patent purchase was a very good investment indeed.
In 1902 the E.C. Simmons Hardware Co. took over mangement of the company and ran it sucessfully for the next nineteen years, till Winchester bought them out. They made knives at the Walden plant for another year until Winchester decided to sell the property to Schrade Cut. Co., and move all the knife making equipment to their New Haven, Conn. manufacturing facility.
Winchester used this equipment to make knives until the early 1940`s, then they too stopped making pocket knives.
Walden Knife Co. has a rich history and some big names in the cutlery industry associated with them. Below is a picture of a pocket knife and an old knife box from Walden, if you have any post them in this thread
and grinder wheels 
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