Dating a parker 51 dating ru auth php

Designed for people who hold the pen with very little slant 14k 71 72 Extra Broad Stub-Parkers widest stub point. Produces heavy lines on horizontal stroke, thin lines on vertical stroke 14k 70 Medium Stub-a heavier flat point for shaded writing and printing. In 1950 a new system for the date coding was introduced where the two digits only indicated the year, not the quarter hence "50" means made in 1950, this system was used in the US until 1955 and in Canada a few years longer.. 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.

Flaws should always be noted, such as scratches, cracks, dents, etc. 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. The quarter marker changed in 1988 from E, C, L, I to III, II, I or none (last quarter) according to the below table. The first date codes, found for example on the Vacumatics, consists of two digits, the first one denoting the quarter of production, the second denoting the production year. 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.

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