I just saw a poster on another thread comment that they wouldn't buy another Pelikan without an ink window or some translucence in the barrel to determine ink levels. In looking at the photos of the M600 Vibrant Orange it made me wonder if the ink (especially a dark one) would be visible through the barrel. This will be my first Pelikan, and I am really curious. Looking at you experienced collectors for your thoughts. Thanks in advance Rindy_Ruth