The sterling / esterlins are an interesting coinage. Some were really imitative of Edwardian types but they also developed their own designs.
On that esterlin of Jean II d'Avesnes (Hainaut), struck in Mons, the crown is not the royal one but the count's.
Fairly interesting design on that esterlin of Jean III of Brabant, struck in Brussels.
Another one from Hainaut, with the monogram of the county, struck under William I.