Alvin Sellers "Dictionary of American Hand Tools" doesn't show an example. The closest is a "prospecting hammer", similar in that there is nothing on the opposite side of the shank, but weight is given between 16 and 32 ounces and is hafted in the usual way vs the method shown here. He does not list maritime or railroading specialty variations, unfortunately.
All the sledge variations he lists do not have the necked down striking face, suggesting this tool is more of a hammer.