Help with proof marks.

[Raf]

Can anybody please help with identifying these proof marks on a Dutch matchlock ? The barrel is marked with the guild mark associated with the port of Vlissingen better known to British sailors as Flushing. The mark shown is struck twice but with a different scale of punch. There's a possibility this was one of the many Dutch muskets imported for the English civil war. The mark has superficial similarities with the arms of the Company of Blacksmiths but maybe that's just wishfull thinking.