Around 1920 Seth Sears Crocker, founder of Crocker Pen Company left business and his son, Seth Chilton Crocker, took over the conduct of the company. In 1923 Seth Chilton Crocker entered directly in the fountain pen market founding in Boston a new company with its own name: the Chilton Pen Company. In 1925 he launched the first model of the new company. It was a ordinary flattop hard rubber pen, but it was using an ingenious pneumatic filling system evolved from the blow filler invented by his father. That mechanism was essentially a precursor of the touchdown filler that Sheaffer will introduce just over 20 years later.
- that year is esplicitely mentioned in a 1937 catalog for the Wing-flow model.