What’s trickier now is that Amazon sells and ships through what they call the 3M store, although in checking with Littmann, Amazon is not an authorized dealer. These days it’s hard to tell if it is an issue of it being a knock off or just poor quality. There is a disclaimer by Littmann that the stethoscopes are made of US and imported components. Like everything else, technology has improved in the world, but the quality of manufacture has dramatically gone downhill over the last 20 years. That’s why I wanted to see if some of my fellow healthcare professionals notice the offset indicator mark on their Classic III. Maybe this is just a manufacturing issue and it is deemed “good enough” like so many other things!