Hello, I recently purchased a slip cap, eye dropper filler, Waterman 12. The pen has two decorative repousse bands with the same decoration as the pen in the link. In fact it looks almost exactly like the pen for sale at the following link. The only difference is that the patent statement is on the cap instead of the body. Was this done at different times in production? Does the location of the patent date statement identify a time of production range or was the statement placed in both locations during the same production runs? Thank you for your help.