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United States/Stamps : Tagging on some US issues

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copy55555
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21 Mar 2019
04:40:54pm
I was wondering if there was an exact way to determine the difference between "pre-phosphored" and "overall tagged" stamps using UV lamps. For example, Scott #s 4782-5 and 4782a-5a.

Scott's also mentions straight edges either top/bottom or sides but 2 of the stamps have the same corner locations. Working with used singles.

Tad
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angore
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21 Mar 2019
05:03:41pm
re: Tagging on some US issues

There is a database for US tagged stamps that has images to show differences.

http://stampsmarter.com/features/Tagging_Home.html

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