Watch List notes:

Justin I - Barbarous Imitation. c. 520-530 AD.. AE follis (31.56 mm, 10.80 g, 6 h). Diademed draped and cuirassed bust right; legend fragments: "DN I...STI - NVS ...." / Large M; above, cross; below, illegible officina designation; in exergue, C[O]N. Prototype: SBCV 62 or similar. 

Ex-Alfredo De La Fe collection of barbarous coins. 

Contemporary Copy of Justin I Large-M follis of Constantinople