|Descr.||Double Line Ruling Pen|
|Mark 1 lateral L||344|
|Mark 2||R.ESTERBROOK & CO.|
|Mark 3||DOUBLE LINE|
|Mark 4||RULING PEN|
|Mark 5||MADE IN U.S.A.|
Described in contemporary advertising (Zanarian) as: "No. 344. Double Line Ruling Pen. This pen makes two lines at once, and is especially adapted for architects, engineers, draughtsmen and bookkeepers." This nib was included in both the 1883 and 1938 Esterbrook Catalogs.
The Esterbrook Project describes this nib as designed to draw with a ruler two equally spaced straight lines of the same weight. It was most commonly used to lay out borders on accounting ledger sheets and in drafting. It was often used with colored inks such as red.
There are no additional versions of the Esterbrook #314 Double Line Ruling Pen in the Chappy's Nibs collection, as pictured below (gray-finish).
Click any image for a full-resolution photo: 2200 x 630. The image with the ruler is 2300 x 1196.