VINTAGE AND FROM AN ESTATE SALE.  This looks similar to another "Coal Miner" knife by Robt Klass but it isnt the same model.
 
Black wood and Rostfrei.  Robt Klass Solingen pocket knife. Marked on both sides of the blade.
 
Single blade knife with beautiful real wood material. Very little signs of age.  Great snap.  SEE PICTURES.
 
3/84" long when closed including the loop.
 
Location E2