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Covers that are dated,
of course, pose no problem, nor sets that are known to have been
issued in a certain year, but, for the vast majority of covers,
unless you’re ready to make a career of studying covers,
the best you can hope for is narrowing down your guess to within
a factual range of years. For example, if the cover you’re
trying to date is a front-striker, you know it’s pre-1979
(the last front-strikers appeared in 1978). |
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The only general dating
guide, and by far the most comprehensive, is the MM Dating Guide. This guide lists the known range
of dates for each specific manumark. As ongoing research reveals
more information, the guide is normally updated annually. It
currently lists over 2,000 different manumarks. |
