Constantine X Ducas. AR trachy version of AV Histamenon. 26.18mm, 2.57 g. 1059-1067 AD. Constantinople mint. Obv: +IhS XIS REX REGNANTInM legend with Christ seated facing on throne with straight back, holding Gospels. Rev: +KWN RACL O DOVKAC legend with Constantine, bearded and crowned, wearing jewelled robe, standing facing on low cushion, holding labarum with dot on shaft, and cross on globe. Sabatier 5 var (shape of throne back); billon or silver version of Sear Byz. 1847; BMC 1-2. Timeline Auctions, int. no. 67560. Billon or silver versions of this coin, which was otherwise struck exclusively in gold, are rare. Similar silver versions of the Regnantium (Christ seated) type are also known for e.g. Constantine IX (BMC 15). With exclusive permission of TimeLine Auctions (www.timelineauctions.com), June, 2016.