Production dates, amounts, and estimated surviving examples are given for each mint. Estimates are based on an average 1–5% survival rate of coins of the period due to circulation, clipping, and melting so counts may vary from lists of known examples of specific issues.
In operation from early 1646 to May 1646 when the beseiged castle surrendered. Issues are identified by an "HC" mintmark. Original production is estimated at 500-1,000 coins with about 5-10 surviving. Issues include Halfcrowns and possibly Shillings.