1000 francs type "bleu" modified - Banque de l'Algérie November 5, 1918.

P.7a - K.426b (R2).
Alphabet Y.3 - number 664. Signatures: Moyse / Moreau / Biron. A rare type, difficult to find in good condition. Only three examples in total are referenced in the PMG population database to date! This example comes from CGB's "Billets 20" fixed-price sales catalog, sold for 680 EUR (2013).
PMG 20 Very FIne (1924015-027).
Rare and beautiful copy. TB+.