Dating a parker duofold
A commonly-repeated explanation is that the T indicates production at Parker's Canadian factory, in Toronto. Parker's Toronto factory was set up to get around the high tariff barriers between the United States and the British Empire and Commonwealth.This is mistaken, for a number of reasons -- not least being that these pens are also prominently marked "MADE IN U. Most Parkers marked "MADE IN CANADA" were destined for export, not for the Canadian market.
To free up space, Quink production was moved out of Parker's hometown of Janesville, to a new facility located some 235 miles northwest in Menomonie, Wisconsin.There are some 1930s Parker date codes that have both two digits and dots.Definitive documentation is still lacking, but it would appear that the dots in this context denoted the month of production within the quarter denoted by the initial digit.The anomalously late date codes also tend to cluster around certain years and certain models, further indicating that they were not applied in error, or arbitrarily.Parker once again applied date codes to its products starting in the later 1970s.For further information on the "T" codes, see Tim Laros and David Nishimura, "'T' is for Tractor: Parker 51 'T' Date Codes, Revisited" in the Pennant, Fall 2016.
he Duofold is the pen that actually made the Parker Company one of the greatest pen-manufacturers of the world.
From 1950, the date was denoted by another two-digit system: 50 was the mark for 1950, and .
With one exception, the system was dropped not long thereafter (the earliest US date code we have seen is 34; the latest, 56, first quarter, on a Parker 51 pencil, with the latest on a Parker 51 pen, 52).
T-marked 51s are found in the USA -- not in Canada or British territories -- nor do they exhibit any of the subtle differences that distinguish Canadian 51s from their US-made equivalents.
At the time the T code was in use, the postwar surge in demand for 51s was outstripping Parker's production capacity.
This code uses one of the ten letters in QUALITYPEN to stand for the respective year digit between 0 through 9, followed by another letter in the sequence E, C, L, I to designate the quarter.