A stunning piece of vintage industrial history and nostalgia. 
I have had these before, however this is a particularly nice one, I don’t think I have ever had a triple one before.
 
This lovely piece would have been hung on the wall beside a clocking in/out machine in a work place, possibly a factory or a shop.
 
This one is particularly nice having the wooden frame around the slots and three rows of slots. 
Measurements: 42 x 6 x 91cm High