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Stamps (Philately)/Plate number on American inventors 1983


Can you explain me Plate numbering on sheet of American Inventors 1983 Scott#2055-2058 and how many different color numbering exist.
Thanks in advance.
Mihajlo Knezevic

Mihajlo Knezev,

I don't know that specific information, but I can point you in the direction of an organization that will know the answer.  I recommend contacting the The American Plate Number Single Society at:

Good luck!

-Mark Leon

I deal in United States Stamps
American Art Glass
and Halloween Costumes!

Stamps (Philately)

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Mark Leon


I am a collector of United States postage stamps, and also a stamp dealer. I`m a member of the American Philatelic Society (APS). My principle area of interest and expertise is in United States Stamps.


I've been selling stamps on the internet since early 1996. I maintain a stamp web page that concentrates on mint US stamps issued generally between 1890 and 2009. I'm an active seller on since 1996, under the user id "mleon". You can find my web page at

I have a Bachelor of Science degree in computer science from the University of Nevada at Las Vegas, 1984.

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