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Is Parker's chief pen ballpoint pen universal?

Universal. According to Parker official website, the refills of the main ballpoint pens are all of the same model, which are universal refills. George Safford Parker, the founder of ParkerPen, 1863 was born in Shulsburg, Wisconsin, USA. In order to supplement his meager salary, George Safford Parker became a middleman, mainly helping John Holland's pen company to sell pens to his students.