St. Helena. Æ halfpenny. 9.36 gm. 29 mm. 1821. East India Company coat of arms / ST. HELENA HALFPENNY around, 1821 in the center. KM-4A. Good Very Fine.Napoleon's final exile was here. St. Helena is a fascinating British territory in the South Atlantic, currently accessible only via a long boat trip though they are now building an airport.