Watch List notes:

Charles II (1660-85), Halfcrown, 1670 vicesimo secvndo, draped and laureate bust right, rev. reads mrg for mag in error, crowned shields cruciform, cypher in angles (ESC 455 (R3) [467A]; S.3365), fair but rare with the legend error reading.
provenance
SCMB, November 1976, F214 - 'RRR' - £32
Estimate: £80 - £120