Middlesex 341, Ibberson's (Dalton & Hamer, page 134)

Denomination: halfpenny, scarcity: Unique
341.  O: St. George killing the dragon, crest, a boar. HOLBORN LONDON. 
         Ex.: C. JBBERSON. (Same as No. 339, or very similar).
      R: No. --- | SIX | PENCE | 1800.

No. 341, unique (in the British Museum).

Keywords

holborn london,c jbberson,no,six pence,1800