Hello Carol could you re-email me on this (i accidentally deleted your email, i still have the pics, but no address to respond to). I'm sure it's a halfcrown, i've narrowed it down somewhat as to a type. Think is i can't make out the mintmark (i need this to finally work out which issue it is from). Could you make the pictures any bigger? (The mintmark should be on both sides, there should be one before the H in Henric...) I think we are looking at about £100 or more, probably £130 or as much as £170.