Egypt, Alexandria. Diocletian 284-305. Tetradrachm. (Billon, 20.00 mm, 7.80 g). Dated RY 11 = AD 294/5. ΔIOKΛHTIANOC CЄB Laureate, draped and cuirassed bust right. Rev. The Emperor, laureate-headed, in military dress, riding the horse at a left trot, holding sceptre and greeting with the right arm outstretched; L KA (date) in field. Geissen-. Dattari-Savio Plate 282, 5619 (this coin). Emmett 4048 (5). Extremely rare, Good Very Fine. Ex Giovanni Dattari collection. Ex Naville Numismatics Ltd., Auction 48, 27.01.2018, lot 325. A splendid coin, especially for its reverse with the emperor on horseback in glorious and solemn military attire, holding a sceptre, advancing and saluting with his right hand. According to Vogt (I, p.225), the scene preludes a forthcoming arrival of Diocletian in Egypt, but it is also possible that it is an issue celebrating the sovereign's ‘decennalia’ celebrated in Nicomedia in November 294 AD.