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.

The stamp initially had three dots and for each quarter one dot was filed down leaving none for the fourth quarter.

The quarter marker changed in 1988 from E, C, L, I to III, II, I or none (last quarter) according to the below table.

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.

And since the gold part of the microlayer can be as thin as about 0.003–0.3 micrometer, the amount of gold used in the process is incredibly low.

III" There are however inconsistencies, such as missing dots and quarter codes appearing on the wrong side of the year code.

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.

In mid 1934 Parker began marking most pens and pencils with a date code, both the barrel and the nibs were marked, but lacking a date code doesn't necessarily mean that the pen was made pre-1935, since many imprints have been worn off with use.

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. For very heavy lines on the down stroke and medium lines on the side stroke 14k 73 74 Fine Oblique Italic right hand 18k 75 Medium Right Oblique 14k 75 Medium Oblique Italic right hand 18k 76 Broad Oblique Italic right hand 18k 77 Fine Oblique Italic left hand 18k 78 Medium Oblique Italic left hand 18k 79 Broad Oblique Italic left hand 18k 79 Medium Left Oblique-For those who slant the pen when they write. Designed for people who hold the pen with very little slant 14k 71 72 Extra Broad Stub-Parkers widest stub point. So far the earliest date coded pens found have had the code NL for 1979, and all of these pens were made in the US. Possibly anticipating the 1980 official start of date coding in France and the UK, this could have led to the presumption that the dating actually began in 1970, but proof of this has still to be found. ED = Eyedropper filled FU = Filler unit GF = Gold filled GFF = Gold filled filigree GFM = Gold filled mounted GFT = Gold filled trim IF = Ink feed IM = Iridium LF = Lever filler MBL = Marble MHR = Red and black mottled hard rubber MIB = Mint in box NB = Nib NF = Never filled. Untouched, unfilled pens, not currently available in stores.