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What is the variety

 
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alaska
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Joined: 30 Mar 2013
Posts: 7
Location: Torun - Poland

PostPosted: Wed May 29, 2013 9:00 am    Post subject: What is the variety Reply with quote

What is the difference between:
10p light tan - 1st seen: Sep 4/90, and 10p greyish orange - 1st seen: Feb 25/76, and 10p greyish orange - 1st seen:Sep/84?
How to recognize Phosphor tagging?
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brandenburg5
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Joined: 05 Oct 2007
Posts: 135
Location: Sunnyvale, California USA

PostPosted: Wed Jun 12, 2013 7:54 am    Post subject: Reply with quote

The difference between Feb 25/76 and Sep/84 is in the numeral 0. In the Sep/84 issue, the zero is thinner than in the Feb 25/76 issue.

The Sep/84 issue was only from one prestige booklet, so you will not find many copies around.

The light tan Sep 4/90 is a different color from the older issues.

--Larry
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alaska
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Joined: 30 Mar 2013
Posts: 7
Location: Torun - Poland

PostPosted: Fri Jun 14, 2013 8:07 am    Post subject: Reply with quote

Many thanks for your reply.
I found here:
http://www.machin-and-wilding-stamps.co.uk/contents/en-uk/d878.html

And what is the best way to identify Phosphor tagging?
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brandenburg5
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Joined: 05 Oct 2007
Posts: 135
Location: Sunnyvale, California USA

PostPosted: Sat Jun 15, 2013 4:50 am    Post subject: Reply with quote

Use a short-wave ultraviolet light. Look for the afterglow. In a dark room, shine the light on the stamp and close your eyes for 10 seconds. Then turn off the light and open your eyes, and look for the glow after the light is turned off.
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