Watch List notes:

OTTOMAN TUNIS
Abdul Aziz (1277-1293ah / 1861-1876ce)

25 riyals 1280ah (1864ce) AU 4.89g cf. KM 148 R -xf

This particular coin was overstruck on a French coin of 20 Francs, probably of Napoleon III (cf. KM 781.1). The undertype legend is partially visible. Cf. Fenina, page 244. Ex NYSale XXXV:1448.