They look authentic to me at first glance. However, I'm not an expert in Roman and Byzantine coins, so hopefully some of these folks will chime in. I can say that in general all requests for authenticity or identification should include weight to the nearest tenth of a gram and maximum diameter to the nearest mm. If there's a doubt about authenticity then photos of the edge are also desirable, to reveal possible evidence of casting.
thank you friend for your analysis, but as for the weight and diameter I will not be able to post, as these coins are not in my possession, however, your request is quite relevant.
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