Watch List notes:

BRITISH COINS, Tower mint, Halfcrown, Gp II, type 2c, mm. portcullis (over harp?) on obv., small harp on rev., second horseman, rev. shield with C R at sides, no stops, a in avspice an inverted v, 15.03g/4h (Bull 204a/M20, this coin; SCBI Brooker –; N 2207; S 2771). Good fine, reverse better, excessively rare; one of two known specimens £300-400

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Provenance: R. Carlyon-Britton Collection (XIV, 266); SNC September 1988 (5529); C. Adams Collection, Spink Auction 177, 1 December 2005, lot 96.

The other specimen, from different dies, was in the Shuttlewood collection, SNC June 2001 (HS 0572)