It is not my intention to discuss, just a little debate. Pardon my way of expressing myself because I do not speak English.
A variety of jobs hammer bronze or copper are used, it is true, but this is a little small to work with him. 5 inches, barely protruding from a hand man of medium size. I think it would be uncomfortable. I think, a hammer of office, would have more design hammer, a more practical handle. For me, it is having a total lack of design. Or rather, it has the right design to break glass. The serial number makes me think of an element belonging to a group such as the firebox. Here in Spain, it is unusual to find a hammer job with a numbering such ...
Sincerely senda