Proof of the back. Different from the other known copy because Without the names of the artists and accompanied by a letter from the Director of the printing press of the Bank of Algeria, who addresses this project to the Deputy Governor of the Bank of Algeria for his personal collection. Document attached on green card: Tunisia 10,000 Frs 1952 back. Sold in AU grade for € 2857 at cgb.fr, Paper-Money # 18 of 2011 (lot # p18_0923). The other known copy on non-watermarked paper illustrates the Kolsky book and was sold in XF grade for € 2707 at cgb.fr, Paper-Money # 18 of 2011 (lot # p18_0922). Very rare!