In good working condition.
the stamps are complete with the early lettering and numbers. 
Graphotype was a brand name used by the Addressograph-Multigraph Company for its range of metal plate embossing machines.
The machines were originally used to create name plates  (dog tags) for the military identity.
The machines came in a number of variants with sliding, hand wheel or keyboard selected letters.  The style was used in the early 1940s for the US military.
VERY RARE!!