Not dated 500 Grossi (ND 1822-1826) in black on white paper. S/N: "28". Seal of the Ministry of Economy at bottom left. Signatures by Mavrokordatos, Notaras and Negris. Never redeemed Printed on watermarked paper. Inside holder by PMG "About Uncirculated 53". (Hellas 3c) & (Pick 3r).