This is a very rare Arbeitsbuch (labour booklet/pass), it was especially/only for workers in mountans (Arbeitsbuch für Bergleute).
While we have see several of these passes in “imperial” style, this is the very first ever we have seen with third reich eagle with swastika.
These particular booklets were only short in use and later replaced by the well known brown booklets.
Rare and for sure a nice addition to any Arbeitsbuch collection! Try finding another!
the condition is used but good and definately collectable.