Metal Paper Hole Punch c1940

The multi hole punch dates back to 1886, while the single hole punch dates from 1885. A multi hole punch would be found in offices and used for punch holes in paper to be filed, where the dingle hole punch would be used by conductors on trains.
 
This is a metal multi hole punch for an office. Dating around 1940
 
Measuring: 13cm x 10cm