Not sure of exact age but I've had them for years. I've only worn them a handful of times as they're a bit high for me so it's time to let them go. The leather is in overall very good condition with only a small amount of wear which doesn't show when polished and buffed.
Even despite close inspection we don't always find everything. We also don't wear them to check for anything. What we do is a good check both inside and outside, feeling with our hands and looking carefully under the light.