Welsh Marches coinage in general is across a region which includes the Chester and Worcester mints in operation from 1644 to 1646, but there are coins with a plume mintmark from an unknown source in that region (such as Bull 684).
Halfcrown
1644 Halfcrown minted in Welsh Marches
Charles on horseback left, holding reins with left hand and sword in right.
Declaration in two lines divided by row of pellets, three plumes above, date below.
Bull 684, SCBI Brooker 1212 same dies, S 3135. Plume mintmark. 1 of 12 known (2026).