This issue is impressed around the edge to celebrate the queens visit in July, and it appears that during that process a hairline mark was left in front of the Queens bust as pictured. Nevertheless a scarce issue. Cased and certificated.
NB. The plastic capsules containing the coins were not airtight. They tend to age to a golden colour as pictured, and this also allows the coins to tone slightly. The obverse picture is with the capsule open.