Hi. Bought a Steel Tube Kahles 8x56 scope about 35 years ago.
Living in the Tropics it developed some fungus on the thick part of the heavy duplex, so just out of curiosity, I emailed Kahles in Austria, and asked them if they could recommend any one here in Australia, (as I didn't want to send it to just any one on the chance that they could stuff it up), to have a look at it. There response absolutely blew me away, received a very polite email saying send it over to them and they will fix it free of charge.
After all these years, who would have thought this would have been a response from a company that when I bought the scope didn't give a life time warranty.
Cheers Baz.
PS. It still is my favourite scope.