As Vitara said, Cadenheads had shipped a lot of stuff to the USA in the late 1990s. They are all in 75cl bottles and have small white labels. Cadenheads asked for a stocktake at some point and they found that loads of the whiskies hadn't sold. It was all shipped back across the Atlantic. This included stocks of Braes of Glenlivet and Millburn - both of which are in my collection. The shipping and shelving have taken their toll, and the bottles and boxes are not all in A1 condition. The Millburn was still on sale a couple of months ago, but it was around £65 a bottle - quite expensive for a 13yo but, as you point out, a whisky that is very difficult to get in such a young state any more.