Last year I bought a used Leica Asph Zoom eyepiece here on IIS which turned out to have some tiny spots on one of the inner elements, an issue with a particular batch of eyepieces made a few years ago.
I contacted Leica Australia and described the issue and told them that I had bought it secondhand and did not know it’s age nor did I know the original purchaser…….
To cut a long story short, Leica arranged for the eyepiece to be collected, sent to the factory to be inspected and cleaned and posted back to me … took only 6 weeks, I just unwrapped it to find it pristine with new eyecup and cap included as well
Cost to me $ 0.00
How is that for service !!!