The English penny, originally a coin of 1.3 to 1.5 grams pure silver, was introduced c. 785 by King Offa of Mercia. These coins were similar in size and weight to the continental deniers of the period and to the Anglo-Saxon sceats which had preceded it.
Silver 'reform' penny of Edgar I of England, Lewes mint, c. 973–975.
A sceat was a small, thick silver coin minted in England, Frisia, and Jutland during the Anglo-Saxon period that normally weighed 0.8–1.3 grams.
Series U sceat
Anglo-Saxon-Viking coin weight. Used for trading bullion and hacksilver. Material is lead and weighs approx 36 g. Embedded with an Anglo-Saxon sceat (Series K type 32a) dating to 720-750 AD and minted in Kent. It is edged in dotted triangle pattern. Origin is the Danelaw region and dates 870-930CE.
Series K sceat (Kent)
Image: Series Kobv