From T206Resource.com (underlining is mine):
"Polar Bear backs were issued with one design printed in blue. This back is unique in that it's the only T206 back where the areas not printed produce the advertising text."
Because of this, you're more likely to find text that doesn't appear as sharp on PB backs as it does on other backs.
Last edited by Rob D.; 06-19-2012 at 11:55 AM.
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