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A technical explanation and cutaway illustrations of the filler are in Anatomy of a Fountain Pen II: The Parker Vacumatic.
The jeweled blind cap was also discontinued in 1942; this very visible change resulted from the wartime need to conserve critical war resources.
For instructions on reading this code, refer to Parker’s Date Coding System.
Although there were several design changes, some minor and some quite significant, the Vacumatic line remained in Parker U. A.’s stable until about 1948 and perhaps as late as 1953 elsewhere.
Patent N 1,904,358, applied for on September 14, 1928 and issued on April 18, 1933) from Professor Arthur O.
Although the pump mechanism was novel, Dahlberg’s design was not entirely original; it was an extension of Huston Taylor’s 1905 bulb-filler patent (U. Caps and blind caps alternated colored rings with black; initally, the pen was offered with barrel either colored and black or colored and clear (so that the user could see how much ink remained).
Slender models and an astonishing variety of miscellaneous sizes, such as desk pens, ring-tops, and fat vest-pocket models, were also available.
These two desk pens, from 1939 (above) and 1941 (below), both have Speedline fillers; but they show a remarkable variation in their exterior designs.
Beginning in the Vacumatic era, Parker pens bore date codes on their barrels.
When the Vacumatic went on the market in March 1933, the Standard line was offered in black, Burgundy Pearl, and Silver Pearl, while the Junior line, introduced in June, was offered in black, marbled Grey or Burgundy, and Crystal.
At the end, Vacumatics were available in Emerald Green Pearl, Azure Blue Pearl, Golden Pearl, and Silver Pearl.
The upper pen bears on its band the star that Parker used briefly before introducing the Blue Diamond.
The total range of sizes produced over the Vacumatic’s lifetime is broad enough that assembling a comprehensive list would be nearly impossible.
The plated nib shown here is on a 1938 Silver Pearl Standard.