Beylicat of Tunis (Ottoman administration), 50 riyals ND (1846 / AH 1263).

P.A2.
Without alphabet or number. Extremely rare! Only four examples in total are listed in the PMG population database to date (2x PMG 25 and 1x PMG 35: Top Pop). The latest example to come up for auction, graded PMG 25, sold for USD 18,000 including fees at a Heritage Auctions (USA) sale in September 2019.
PMG 20 Very Fine (2462200-002).
Extremely rare and very fine copy with tears and foxing on verso. TB+.