It's funny: Before release of the new 5517 in 2018, the kinked lugs of the 5817 disturbed me a little bit. However, I always loved the guilloche pattern which looks like a vortex. Simply stunning! Now, one year since the presentation ot the 5517, I still don't get warm with the new model, but I totally changed my mind regarding the kinked lugs of the old one. Love them!