I think it may be one of the Andronicus II Palaeologus and Michael IX AR Basilikon. Constantinople, AD 1295-1320. KYPIE BOHΘEI, Christ enthroned facing, raising right hand in benediction, holding book of Gospels in left; IC - XC across upper fields / AVTOKPATOP#1028;C P#412;MAI#412;N, emperors standing facing, holding long labarum between them with circle beneath plaque. Sear 2402; PCPC 167; DOC Class VIII, type F. 2.11g, 21mm, 6h.
https://www.acsearch.info/search.html?id=6920391has similarities, the IC-XC is lower down in the upper fields
or it may not be either!
The Ox moves slowly, but the Earth is patient.