Antoninus Pius, AD 138-161. Roman provincial Æ 18.5 mm, 4.59 g, 12 h. Bithynia, Nicaea, AD 138-161. Obv: ΑVΤ ΚΑΙϹΑΡ ΑΝΤΩΝ[EΙΝΟϹ?], bare-head, right. Rev: ΝΕΙΚΑΙΕΩΝ, Apis-bull standing, right, head surmounted by solar disk and wearing uraeus crown. Refs: RPC IV.1, 10001 (temporary); Mionnet 5.89,455; RG I(3).413,118(2) pl. LXIX, 19. The authors of RPC, in my opinion, err when they describe the bull on the reverse with "head surmounted by crescent," even on the better preserved variety struck with the same reverse die, RPC IV.1, 5901. It seems clear to me that it's a solar disk and Apis is wearing the uraeus crown, as depicted in numerous ancient works of art. Egyptian bronze figure of an Apis bull, Dynasty XXVI (665-525 BC), probably Memphis. Christie's Auction, 26 October 2004. Life-size basalt statue of the Apis Bull dedicated by Hadrian to Serapis in Alexandria (Egypt), Osiris, Sunken Mysteries of Egypt exhibition, Paris (2015). Photo by Carole Raddato. Bronze figure of Apis, Lower Egypt, Late Period, about 600 BC. British Museum, EA 37448. In contrast, Mionnet (no. 455) got it right, but didn't mention the uraeus crown worn in conjunction with the solar disk. Let's see your bull coins, especially the Apis bull! Or how about any coins with a uraeus?!