| Warren N Lancaster manufactured
fountain pens from the late 1890s up into the 1920s. He seems to
have lost control of his own company in 1916, but he is listed in
Manhattan in 1920 as a fountain pen manufacturer. His pens appear to
be blo fillers, and I had always assumed that was true, but when I
looked at the original patent, it turns out that in the patent they
are listed as self fillers with the method of filling being removing
the barrel and twisting the bladder. It could be that they were sold
as blo fillers, but the patent was deceptive to evade the Crocker
blo filler patent. This will take a little more investigation.
His pens are very similar to AA Waterman pens and some of the
Lancaster nibs have the same odd venthole shape as the AA pens. .
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