This is what I found on a search for "hammersmith" on Google:
Job Description for: HAMMERSMITH
Repairs defects in silver hollowware, such as trays, creamers, teapots,
and bowls, using hammers, dollies, and tracing punches: Examines article
to determine nature of defect, such as dents, uneven bottom, scratches,
or holes. Places article on anvil or dolly and pounds out dents or
bulges, selecting hammer with head corresponding in curvature with
surface of article. Straightens twisted articles by hand. Forms
concavity in bottom of article to improve its stability, using tracing
punches and hammer. Verifies levelness of bottom edges of article, using
straightedge, or by rocking article back and forth on flat surface.
Peens edges of scratches or holes to repair defect, using peening hammer.
A smith was someone who generally worked with metal.
Have individuals who lived in Jönköpings län listed with occupations
"smith" and "hammer smith".