Parker Registry
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Parker · 1907-1915
Parker Bookkeeper's Special (#100)
$100-300
Pre-Duofold
Filling System
Eyedropper
Nib
14k gold (two nibs: red and black)
Material
Hard rubber
What to Look For
Two nibs and separable sections allowing red and black ink in one pen. $6 originally. Not to be confused with the Shorthand/Bookkeeper's pen (single nib).
Two nibs for red and black ink in one pen. $6 originally. Specialty bookkeeping pen.