Now in my mid 70's. I recently discovered two unused watermans that have survived cross country moves as well as more recent downsizings. Accordingly, they could be quite old, although I have no recollection of when I acquired them. I have browsed the Internet and viewed hundreds of images of Waterman pens, but have found nothing yet that replicates the two narrow gold-plated trim bands at the base of the barrel of either pen. Also, the letter "F" is stamped on the feed beneath the nib of the cartridge pen. Any help in discovering the model numbers or directing me to other resources would be most appreciated.