Curve dating online

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. Flaws should always be noted, such as scratches, cracks, dents, etc.

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.

NPT = Nickel plated trim NS = Needs sac PF = Plunger fill PR = Plunger RBHR = Red and black hard rubber RCHR = Red chased hard rubber RG = Rolled gold RHR = Red hard rubber RRHR = Red-ripple hard rubber, RT = Ring top SGM = Solid gold mounted SF = Silver filagree SFD = Silver filled SGF = Solid gold filagree SN = Section SPT = Silver plated trim SSM = Solid silver mounted TD = Touchdown filler TR = Tassie ring VM = Vermeille© 1995-2017 Tony Fischier and The Parker Pen Company®/Sanford Ecriture.

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.

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.

Electroplating chemically adds a very thin layer of gold to the base material. The process involves physical vapor deposition of gold (PVD). According to Parker a microlaminated surface of 1.3 micrometer has a "service life" equivalent or exceeding that of a 10 micrometer gold plating.

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