This earthenware, slipware jug is in the Winchecombe style of Michael Cardew.  
Lovely double 'barley' corn slip trailed decoration, warm honey coloured glaze over white slip, over buff/terracotta body. Coldstone pottery, Dieter Kunzemann. 
Impressed mark to base, but can't make it out - see photos. 
Condition: good, the top rim is rather nibbled. 
About a half pint. H.12 D.9 cms