Help to identify these Roman coins please

All 3 are bronze coins, tried to look at on each possible available information online about the coin but couldn’t succeed. 

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The third coin is almost certainly the following:

Severus Alexander, AE21 of Caesarea, Cappadocia. AD 222-235. 5.68 g. Dated Year 6, AD 227-228. AY K CEOYH AΛEXANΔ, laureate head right. / MHTΡO KAICA around, ET ς below, emperor on horseback galloping right, holding spear and raising right hand. BMC 320; Sydenham 573.