 Complete the following phrase:  The iconography of many examples, with the legend surrounding a large cross or a bust of the Virgin Mary, follows Western European models rather than those of traditional Byzantine coinage, and most of them do not identify the Byzantine emperor under whom they were struck. They conform, however, to the general type of the widespread tornese coins, with a weight of 0.60.8 grams, a diameter of 17 mm and silver content of 0.2000.250. Initially they were concave but later issues are flat. They apparently form the continuation of the Byzantine tornese issue known in Greek as tournesion of Emperor Andronikos II Palaiologos r. 12821328, and like them were probably rated at 96 to the gold hyperpyron. Some bear the name of Andronikos III Palaiologos r. 13281341 and can thus be dated to the 1330s, the anonymous series could be dated to the 1340s marked by a destructive 