A Kriegsende classic product has new life as a 3D print. These eye pieces were drawn from an original set and printed in black resin. The threads fit the original 10x50 Dienstglas (these are the bigger binoculars). These are very detailed resin prints which have been coated to give the finished eyepiece a nice finish. I am very happy with how these turned out, I think they are actually better than the toaster-lite repros I made a decade ago (yes, my first ones were made in a modified toaster oven, super classy, very professional).
Price is for one pair.
I only have 2 pairs of 10x50 binoculars in my collection and these fit both, but I can not rule out the possibility that there might be variations based on manufacturers but I believe these will fit virtually all German 10x50 type binoculars and probably a few other things and the thread size was actually fairly standard.