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A collection of ten Mabie Todd Swan Visofil V Series fountain pens from 1935-1936. These pens are noted for their colorful marbled celluloid cap and barrel materials, broad model range, and unique filling system. The Visofil V Series is a uniquely designed ink sac pen with a clear plunger providing a view to the ink level. The sac actually is cut at both ends, with one attaching to the section and the other attaching to the spring-loaded plunger. Repeatedly pressing the plunger draws ink into the sac and eventually the ink level can be seen through the clear plunger. Have your own Visofil V Series pen collection with your coffee!