Coins, hackmetal, scales and weights. The lively Viking coin designs, from Anlaf to Harthacnut, with their triquetra, swords, hammers, flags and world serpent, stand in striking contrast to the conventional English formats.

There's a very interesting article on the distribution of Viking spheroid oblate weights (see the image of scales and weights below) here: http://vikingmetalwork.blogspot.com/2012/11/standardised-viking-weights-part-1.html