THE FLASHLIGHT METHOD
Most cards that I find are unused, some are used, but
even if I don't have an unused one to compare it to I can often still find out the
card number by taking a flashlight and holding it against the front of the card while I look at through the stamp
on the back I can usually read the number this way. If the stamp is a dark color
though it can sometimes be difficult to read even this way , in that case I will take
the postcard into a dark room with no windows (actually there is a closet I usually use)
and the number shows through slightly better with no light on the surface I am looking at but rather the
light coming through the card being sopped buy the ink where the numbers are,
sort of the same principal as an X-ray.Even with that method on the bear band postcard pictured here
the best I was able to get was 0111-3??. but eventually I found it listed
on an old postcard sales list as card number 0111-0357.
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