That is a beauty. $100 OBO. Or a gift to a tool museum or maybe put on consignment in one of those places where they recreate historic living. If it's old enough, it might be an antique, which would up the price. Perhaps contact the TV show American Pickers and ask for help placing it. Needs a little history, so wife should write up what she remembers about its origin. Did the husband buy if from someone who owned it before, is there any story about it she could write down, or picture of her husband using it?
The more I do, the less I accomplish.