Watch List notes:

STUART. Charles I. 1625-1649. AR Shilling (30mm, 6.10 g, 3h). Group D, type 3a. Tower (London) mint; im: tun. Struck 1636-1638. Crowned fourth bust left; XII (mark of value) to right / Coat-of-arms. Brooker 506–7; North 2225; SCBC 2791. Iridescent tone. Near VF.