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Production Year vs. Model Year
Like most manufacturers, Porsche generally began building next years models after the August vacation break. So for example, cars built in September 1959 were considered to be 1960 model year cars. This means that the year the car was built did not always correspond with the model year of the car. "Production year" is not always the same as "Model year", and this distinction remains up to modern times.
But Porsche did not always start the new model year in September. For example, production of the 1964 and 1963 models began in July of the year before. In the earliest years the company records are not clear on when the new model year began, as the company operated in a less structured fashion. And the final model year of 356 production, 1965, began unusually early on July 1, 1964, according factory documentation. [VINs that began the 1965 356C model year were: Reutter coupe body 130512, Karmann coupe body 219070, Reutter cabriolet body 160751]
While Porsche marketing materials sometimes referred to model years, product changes were often implemented mid-way through production. For example, the T1/T2 change came about sometime in the spring of 1957, well before the 1958 model year production commenced in September.
An additional complication in determining the model year of a 356 was that if the car sat on the dealers lot for several months (not unusual with an expensive car like the 356) dealers would sometimes register the car as a year later than it actually was. For example, a 356B built in June 1962 arrives at the dealers in Chicago in late July and is still on the lot in September. The dealer might re-title the car as a 1963 model in an attempt to make it seem more "up to date". Since there were few changes to the 356B between the 1962 and 1963 model years, potential buyers might not notice that the car they were being offered as a "1963 model" was in fact last year's model. Subsequent owners, decades later, would assume their 356B was a 1963 model year car unless they had access to books like Johnson's "The 356 Porsche: A Restorer's Guide to Authenticity" which shows VIN charts by year.
NOTE: in the 1950's, many states (including California up until 1958) registered cars by engine number, not by model number. So if the engine was changed out at some point, the number on the title may not exist anywhere on the car!
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Questions or comments, please email to Barry Lee Brisco, Website Technical Editor,
Published 12/15/05, revised 02/12/06
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