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1. Signature Ahmed, Jamuna bridge, Bangla serial numbers.
2. Signature Rahman (1st sig variety), Jamuna bridge, Bangla serial numbers.
3. Signature Rahman (2nd sig variety), Bangabandhu bridge, Bangla serial numbers.
4. Signature Rahman (2nd sig variety), Bangabandhu bridge, Western serial numbers at lower right.
5. Signature Rahman (1st sig variety), Jamuna bridge, Western serial numbers at lower right.
The fifth variety is the new discovery, and it is odd because the signature reverted back to Rahman’s original signature variety, and the name of the bridge on the back reverted to the old name of Jamuna, but the Western serial numbers at lower right place the order of printing after the fourth variety, and before the first variety dated 2010, which has Rahman’s 2nd signature variety and the new Bangabandhu bridge name.
Apparently Security Printing Corporation must have discovered unused stocks of the second 2009 variety notes and decided to apply the new Western serial numbers and issue these notes into circulation.
Courtesy of Nathan Denkin.