The first Laboratory models had a barely noticeable polished band on the upper part of the barrel. Shortly after introduction an additional model with a stainless steel barrel was added to the line and marketed as the Laboratory Jotter. Whatever the case, it is rare, expensive and eagerly sought after by Jotter collectors.
Others treat it as an experimental color. Some believe the white version was developed for the medical field. Additionally there were 100,000 demonstrators manufactured in clear nylon and a white version which is somewhat of an enigma. These colors are more difficult to find due to their relatively short production run. turquoise, coral, blue, charcoal, gold (mustard yellow) and grey-green. More colors were introduced in 1955, i.e. Originally, the barrels were produced in black, grey, green and red (rust). Approximately a year later when new colors were introduced, the barrels were manufactured from 'Hercocel W' ( cellulose acetate) which was more adaptable to the needs of Parker's marketing department (it could be heat stamped, engraved or imprinted). When introduced in 1954, the pen barrels were made from grooved nylon. The Jotter is distinguished by a plunger and cap made of stainless steel, a stylized arrow-shaped clip, a plastic or metal barrel and a metal tip end. Parker-style G2 large capacity ballpoint refill The external design of the Parker T-Ball refill is a configuration copied by many other brands of refillable pens. The pens are also a popular advertising medium. Its refill has a ballpoint tip originally called the T-Ball (for Tungsten), with a unique textured surface that greatly reduces slipping and failure to transfer ink onto slick paper, known as "skipping." The technology is now commonly used in the pen industry. It is priced between $6 for lower end models, and $20 for higher end models, such as special editions. Since 1954, over 750 million have been sold worldwide. (Later a fountain pen, mechanical pencil and rollerball pen were introduced to the line). The first was the Hopalong Cassidy ballpoint. The Parker Jotter is the Parker Pen Company's second and best-selling retracting refillable ballpoint pen. ( Learn how and when to remove this template message)
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