Watch List notes:

Charles I (1625-49), Pattern Halfgroat, by Nicholas Briot, 1.46g, bare headed bust right, rev. cypher, b below (Brooker 1255; N.2687), lightly toned, very fine.
provenance
Gray collection
Spink Numismatic Circular, September 1986, no. 6122 - £60
Estimate: £120 - £150