Top ten dating for with ip dating on tombs of scipios
The stamp initially had three dots and for each quarter one dot was filed down leaving none for the fourth quarter.
Since production was overlapping examples exist with either the imprint 28 or .8. Also, since this coding system extended over a decade, a pen marked 38 could be produced the third quarter either in 1938 or 1948.
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.
It has been assumed that Parker began marking some of their pens on the trim or cap bands to allow for dating in 1970.
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.
Using the words "Quality pen", one letter per year, followed by a quarter marker, allowing for dating within a ten year span.
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.
Worse than average condition, but still a fully functional pen. All opinions, views, and thoughts expressed herein are expressly the authors, and in no way reflect the opinions, views, or thoughts of the Parker Pen Company®/Sanford Ecriture.