I've had that exact model of binocular since I bought it new 26 years ago, and they are still tacksharp, crystal clear and perfectly collimated. Despite extensive use in cold winter weather and several trips to steamy tropical areas they have never fogged, despite the fact that they are not nitrogen-purged but merely very well sealed. When they were about ten years old they developed some slack or play in the focusing mechanism, and they went to back to Germany for service, coming back looking and functioning like new.
My wife and I do a fair bit of birding, in addition to my hunting, and we've owned and played with a lot of top-end binocs. These remain my favourites and see at least some use virtually every day. By now there is a fair bit of nostalgia and sentimental attachment built into that preference, but the fact remains that they are outstanding binoculars, both optically and in general build quality.