The design was very simple and their are two versions of this coin . The difference was the monogram , the center being an added device versus a straight line. This example has its faults but a wonderful example, I am always attracted to the copper look with clean fields. MANUEL AE HALF TETARTERON S-1977 DOC 20 CLBC 4.4.7 OBV Small neat letters Monogram Sear 57 REV Bust of emperor, beardless, wearing stemma, divitision, collar piece ( Most frequently decorated 5 jewels) and paneled loros of simplified type; holds in r. hand labarum on long shaft and in l. Globus cruciger. Size 20.26mm Weight 2.7gm DOC lists 12 examples with weights ranging from 2.04gm to 2.77 gm with sizes from 18mm to 21mm. My other examples were extremely nice but not as eye catching. Size 18.88 weight 2.89gm The issue was very popular and was imitated as late as 1312 CE, the original was minted between 1143 to 1180 CE. The issue was easy to imitate, no legend and very simple icon. Unfortunately, their is no way to know when exactly this imitation was minted. Size 16mm Weight 2.4gm Their was a century or two this denomination was the dominate coinage of Greece. If you have one of these in your collection please feel free to share. It would be interesting to compare.