All About Pocket Knives

anyone have an idea as to when this one was made?

The C. F. Wolfertz company operated as the Allentown Cutlery Works and used several tang stamps over the years. The three I know of are as follows:

C. F. Wolfertz Co - 1862 to 1873
Wolfertz & Waldman - 1873 to 1905
Wolfertz & Co. Allentown PA - 1905 to 1944

I am sure that Fran the Wolfertz man will give you a lot of detail on tang stamps. He has done a lot of research on the subject and I refer all my Allentown questions to him. There are a some other lesser known Wolfertz stamps as well.

That's a nice older looking piece. I beleive if you search the patent files you will see that Samuel Mason patented a single handled/bolster knife as well. This may be spin off of that patent or a unique version of its own.