Description:

• Name(s): Professional No. A1, Professional, Professional Pen
• Shape: Straight
• Finishes: Gray
• Tip: Pointed
• Prices: $1.00 per gross (1918)

Comments:

• A fine, very flexible pen often used by professional penmen and artists.
• Often described as, “Extra flexible, fine. For fine and ornamental writing.”

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Additional Images:

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References:

The existence of this pen is confirmed or surmised by the following:

• Listed in the c1890 Esterbrook Pens and What They Will Do
• Listed in the Cameron Amberg & Co Stationery Catalog #85, Chicago, May 1918, p 67 & 68. (Contributed by Andrew Midkiff)
• Listed in the 1921 School Supplies Catalog, J. L. Hammett Co., Cambridge, Mass., and Newark, N. J., Catalog #21, 1921; courtesy of The Hagley Museum and Library, Wilmington, Delaware; contributed by Andrew Midkiff
• Listed in the 1926 Esterbrook Catalog: while I got this from another source, it appears that this pdf may originally be from the collection of the Pen Collectors of America, or from the same source from which they got their scan.
• Listed in the 1938 Esterbrook Pens Catalog
• Listed in the 1941-42 Esterbrook Pen Catalog: from the Pen Collectors of America library of resources.