American coin silver nut picks, Lincoln & Foss, Boston

I don't find these very often. They seem to be somewhat impractical and perishable. I wouldn't try them on a hickory nut. They are about 5" long and in excellent condition (no hard nuts. This is a nice pattern, name unknown to me. Marked Lincoln & Foss an two are marked "Sterling". I suppose the third one is also sterling. Ca 1850.