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 late 1645 to February 28, 1646 when the beseiged castle surrendered. Issues are identified by an "A" mintmark and have features associated with Bristol-mint dies - the Bristol garrison and mint workers had relocated to Ashby-de-la-Zouch Castle in September 1645. Original production is estimated at under 2,000 coins with about 20-30 surviving. Issues include Halfcrowns, Shillngs, Groats and Threepences.