Stuarts, Charles I, Tower Under Parliament Shilling, 5.92 gr. 1645-1646 AD, group F, type 4.5. 

Obv: CAROLVS D G MAG BRI FRA ET HIB REX, crowned bust left, 
XII (mark of value) head, 'sun' mintmark. 
Rev: CHRISTO AVSPICE REGNO, cross moline over arms

Condition:
Fine.

Seaby 2802; N. 2232.
With permission of TimeLine Auctions (www.timelineauctions.com), March, 2013