David and Hugh -
I have a couple additional variations of the Executives. One is in fact a solid green barrel and derby with a striped cap and the other is a black barrel and derby with a striped cap much the same as the cap on your blue pen. I'll try to shoot them before Raleigh and post the photo, but if not I'll bring them to Raleigh so that you can see them.
I think that the OS Executive Skylines are pretty scarce, and most of them that are out there often go unrecognized unless they are seen side-by-side with the other two Skyline sizes. They just aren't seen enough to instantly be recognized as OS.
BTW - in my experience the standard size with the gold derby and wide band as shown in the photo isn't all that easy to find.
Best,
Pat