As you say, styles are defined. After googling, it appears to be an intermediate issue, London mint (1377-1399 AD ; North 1331b; Withers Type 1)
Now, as to where the early, intermediate and late styles begin and end is something I wouldn't even know where to begin with...!
Now, as to where the early, intermediate and late styles begin and end is something I wouldn't even know where to begin with...!




















