$2.00 - Flipper Serial Number - 06966000

Hello everyone,
My stepson who has been going through his paper currency asked me about this serial number on a $2.00 bill..

06966000 - Flipper

 

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Here are 2 others on $1.00 Bills I have shown in the past..

 

So what other digits count as "flippable"? 8? 5 and 2? 1?

 

I would say the 8. None of the others.

Here is another from my collection..

 

Here is a true flipper. It reads the same serial number right side up or upside down!

 

I got this $1.00 with serial# 086980 from a dealer's junk bin:

 

a few of my favorites: