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Hence a "47" marking on a 1930's pen indicate that the pen was produced in the fourth quarter of 1937, not 1947, which is a common misconception.

In the second quarter of 1938 this system was however changed to save production time, and a new date code, using a system of dots, was adopted.

This is a standard for shortening the description of pens, either for personal use or when offering pens for sale.

But to reach a 93% visual accuracy compared to traditional gold plating, Parker uses a 3 micrometer layer of which 0.4 micrometer is 14K gold.

Flat, broad edged points generally put to paper at a 45 degree angle 14k Also X Extra Fine F Fine M Medium B Broad FI Fine Calligraphic MI Medium Calligraphic BI Broad Calligraphic 24K or 1000 (parts of 1000) 22K or 916 18K or 750 lowest allowed gold content in France until 1994 15K or 625 discontinued in 1935 14K or 585 12K or 500 10K or 416 Lowest allowed gold content in USA 9K or 375 Lowest allowed gold content in Canada and UK 8K or 333 Lowest allowed gold content in Germany A solid layer of gold, mechanically bonded to brass, or sometimes other materials, with heat and pressure. Gold plating is usually a thinner layer than the above. In 1986 Parker patented a process, developed together with Jamers Snyder of the University of Wisconsin, for depositing microlayers of gold and titanium nitride to create the glow of gold but the durability of chromium.

Left Oblique has opposite slant for left handed writers 14k 80 Needle Point 18k 81 82 83 84 85 Extra Broad 18k 86 Extra Extra Broad 18k 87 Fine Oblique right hand 18k 88 Medium Oblique right hand 18k 88 Extra Broad Executive-Developed for people who like to write boldly and rapidly and want a special flourish to their signatures 14k 89 Broad Oblique right hand 18k 90 91 Extra Broad Oblique right hand 18k 92 Extra Extra Broad Oblique right hand 18k 93 Medium Oblique left hand 18k 94 Medium Italic 14k 95 Broad Italic 14k 96 Fine Oblique left hand 18k 97 Fine Italic 14k 97 Broad Oblique left hand 18k 98 Fine Italic 14k 98 Heavy Italic-Expressly designed for italic handwriting. To be stamped 12K or higher the layer must equal at least 1/20 the total weight of the item. Signs of wear on the nib or light discolouration of the section or around filling lever or button filler. Clear signs of usage, but still a better than average pen.

Year Q1 Q2 Q3 Q4 --------------------------------- 1979 - -- -- NL NI 1981 - UE UC UL UI 1982 - AE AC AL AI 1983 - LE LC LL LI 1984 - IE IC IL II 1985 - TE TC TL TI 1986 - YE YC YL YI 1987 - PE PC PL PI 1988 - IIIE IIE IE E (change) 1989 - IIIN IIN IN N 1990 - IIIQ IIQ IQ Q 1991 - IIIU IIU IU U 1992 - IIIA IIA IA A 1993 - IIIL IIL IL L 1994 - IIII III II I 1995 - IIIT IIT IT T 1996 - IIIY IIY IY Y 1997 - IIIP IIP IP P 1998 - IIIE IIE IE E 1999 - IIIN IIN IN N 2000 - Q.