Aethelbald, King of Wessex, AR penny. AD 855-860. Moneyer Torhtulf. 

+AEDELBALD REX, draped bust right.
+TORHT-VLF-MO forming a cross with N-E-T-A in the angles.

Seaby 1053; Montagu 498; BMC 1-3; L.A.Lawrence coll (this coin).
Extremely rare. Only four known.
See articles in Num. Chron. 1887 pp. 132-138 by Montagu and 1893 pp 40-45 by Lawrence concerning this king and coin type.