Behold the mighty Sleeve-Filler! Honestly, some days we still have to pinch ourselves to make sure the dream we are living is really not just a dream. This Waterman 12SF in its original box creates a pinch-ourselves moment. Gary Lehrer's Waterman book says these were made between 1910 and 1915. The old hard rubber is fragile. As such, we did not force the section to open to restore this pen. This pen is in far too good a condition to accidentally destroy. It remains without a working ink sac. The sleeve on the barrel has a crisp imprint and can be gently coaxed and wiggled to reveal the squeeze bar filler. It is a little stiff in moving so don't force anything. No cracks! 14k gold nib is a stiff semi-flex. Original box a little faded and ink stained but still nice to have. Additional photos available upon request.