That's weird, I have a set of Leupold Coyote coloured 10x50 Mk 4 binos that are made in China and a set of the Leupold Tactical 10x42 BX-2's which are made in Japan both with the Ret in them and yet the Mk 4's made in China seem just that bit crisper and have better colour and light retention, I would never get rid of the Mk 4's, but I can read the 1mm tall writing on a soup box at 5.9yds with both pairs and car licence plates at 525 yards, Point being is as long as this stuff is made to Leupolds Specs then nothing else matters, I try to buy American made as much as possible even though I am not American, I have a lot of respect for Leupold as a company along with Bushnell's Elite series,
John.