My (very small) collection of C.I.Co. cable tops. The left-most example is unmarked, while the other two are marked. These are pretty elusive, so if anyone out in ICON land has any in any different colour I'd definitely be interested in taking a look. There are white examples known but they are few and far between.
Not sure of the U-# on these if they even have one.
A view of the markings on top [id=451053508; here]