Watch List notes:

Greece, Ionian Islands, William IV (1830-37), silver proof 30-Lepta, 1834, Britannia seated right, rev. value in wreath, stop after date, plain 4 (KM 35; Pr.9A), toned, about uncirculated, rare.
:
Spink auction 5, 17 May 1979, lot 306
Estimate: £400.00 - £600.00