J Silva & Jamão Lisboa 24cm Swiss Leaf Cleaver Carbon Steel France 1920s-50s

Marked J Silva & Jamão Lisboa but most likely made in France between the 1920s and 1950s with carbon steel blade, brass ferrule and turned (boxwood?) handle. 

Searching for J Silva & Jamão Lisboa did not turn up anything, I would assume they were a retailer or distributor, the design and construction style is very classically french. The more detailed brass ferrule and smaller diameter handle in boxwood rather than the more common beechwood suggest older manufacture, possibly from the 1920s to 50s.

Swiss Leaf or Butchers Leaf cleavers have a much thinner blade than heavier butchers cleavers and are more designed to be used to cut soft joints and trim