Unfortunately, there was more than one company that used the Essex name, The "Krupp" marking was the German steel firm that produced the fluid Steel (Fluss Stahl) used to build the rifle.
Take it to a gunsmith.
No published sn data
Need the name of the maker to answer. ********* Fluss Stahl is Fluid Steel, produced by Krupp, in Essen Germany. But we still need the make of the gun to answer your question.
No sn data available.
No way to answer without a DETAILED description of ALL markings.
I do not know but will know in a month I put it in a wwII gun auction.
Brno is in Czechoslovakia, Essen is a city in Germany. Two different countries. "fluss stahl" refers to "fluid steel" made by KRUPP Industries located in Essen, Germany. Since Krupp was one of the premier manufacturers of high quality steel products in Germany prior to (as well as after) WW2, there is a good chance that Brno used KRUPP steel to produce rifle barrels. Especially in the late 1930s.
You have a rifle made of fluid steel from the Krupp steelmaker at Essen Germany. That is as much information as we can give you from the information you gave us. A gunsmith should be able to identify your gun in person, but we would need a lot more information to make a good guess- sorry.
Probably between $800-$2000 depending on condition and the grade of the gun.
No published history
3 barrel guns (most commonly 2 shotgun and one rifle) are known as Drillings, from the German word for 3. Suhl was the city in Germany where this gun was made. Krupp Stahl means steel made by the Krupp company of Germany. If you do a Google IMAGE search for German drilling gun you will find several pictures.
Answer Ithaca s x sdo you mean the s x s 12 ga or 20 ga shotgun with barrell markes with the words spezialgewehr stahl=eried krupp essen , these are also showing Spanish proof markes and Spanish royal creast with case hardeden