Thanks Dan!
The detail on that cap is really interesting, and I have yet to find a description of it anywhere. It has a gold clip riveted in place, true to Waterman form, and 13 engraved lines going from the bottom of the cap to just under the ball of the clip. they end prematurely at a width just a bit wuder than the width of the end of the clip, and at the bottom is a nautical star. I assume it has patriotic meaning, the thirteen stripes and a star and all, but no mention... here's a detail shot:

I did a bit of burning, and curves adjustments in Photoshop to bring out the features I was talking about