Waterman 20-sized red & black mottled hard rubber eyedropper, circa 1910. In those years pen companies competed to offer oversized pens. This is a wonderful example of Waterman’s largest pen. A very large and impressive instrument (also used, in association with the “World’s Smallest Pen” to attract attention in advertisements, in store window displays and Expositions). The number 20 is the biggest pen ever made by Waterman. The nib is also the biggest Waterman nib: it features a huge #10 nib, used only for the model 20. This model holds an enormous amount of ink. The pen is fitted with an early slip-on type cap and has a shoulder-less section. Endpiece marked “20”. Clip marked Clip – Cap Ideal Pat. Apr. 1910. Sept. 26-05. Large gold heart-vent nib engraved “Waterman’s / IDEAL / New York / No. 10”. Black hard rubber feed. 168mm long, 20mm wide at base of cap. Excellent condition, crisp imprints. A really stunning pen and to find one in red & black hard rubber and in mint condition is almost impossible. Truly, a rare bird! This is a museum quality pen. Should you need any further information, condition report or extra photos please do not hesitate to contact us.