Edward III 1361 third issue hammered gold 1/2 Noble found by Boston Beau- 3.78g 26mm
'Your coin of Edward III is a half noble of the Pre-Treaty coinage, with a Series C obverse and a Series A reverse. There are many 'mules' of this kind in the Pre-Treaty coinage, and this one can probably be dated to 1351. I can see why you thought that this might be a coin of the third period, which has lettering that is fairly similar to Series A lettering.'