Parker 51 Colours
Two different ranges of colours were used in the course of 51 production: one for the Vacumatics between 1941 and 1948, and one for the Aerometrics from 1948 onwards. Even within these periods, however, some colours were added and others removed. Here is a chart of the main production colours but in addition to that other shades can be found; generally such examples are either prototypes or replicas.
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