This is an original Singer Employee Pin noting the celebration of Singer's 100-year anniversary. This rare badge would attach to one's lapel, and at 3/4" in diameter, it is slightly larger in size than one of the standard .
This particular pin would have been given to a Singer employee in Italy, and it even says, 'Macchine Singer Per Cucire' in the Red 'S' on the badge - translating to, 'Singer Machines for Sewing'.