Am needing help in identifing a drilling that we discovered within father in law's collection, after his passing.

Markings on top of each barrel read: 'prima essen" with "gewerhrlau stahl krupp" marked within. Also, looks to be crossed swords in center of same?

There are of course several stampings of numbers and markings under the barrel, that I can provide pictures of, if I can be advised how to do this.

Thanks in advance.