Sieg,
Scabbards with the placement of screws as EP&S used are indeed found on other daggers occasionally. TW sold a very nice Klass SS dagger with one of these scabbards last year at MAX.
When I noticed this some years ago, I was told that EP&S made their own scabbards and sometimes sold them to other Solingen makers. I have also seen a couple of EP&S daggers with a more normal screw placement. All I can guess is that the Solingen makers helped each other out when one was low on parts or assemblies. This is well documented with Heer daggers so I presume it happened with others.
I can tell you that if you spot an SS or SA dagger with the EP&S screw placement and call it out as a Pack dagger without looking at the trademark, you have a 99% chance of being right.
Dave
