English: Top photo: 1942 Parker 51 vacumatic in cedar blue (top) and 1949 Parker 51 aerometric in burgundy (bottom)
Bottom photo: Parker 51s disassembled to show filling systems
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{{Information |Description={{en|Top photo: 1942 Parker 51 vacumatic in cedar blue (top) and 1949 Parker 51 aerometric in burgundy (bottom) Bottom photo: Parker 51s disassembled to show filling systems}} |Source=Transferred from [http://en.wikipedia.org en