This art deco inspired jug had many incarnations: it was made from 1941-1966. This particular jug was made in the late 50s- when textured splatter glaze was all the rage. You have to hand it to Diana- they could reproduce an essentially 20s form in a whole range of finishes- from single colour, shiny glazes, to sponge dual glazes – to this sort of typical 50s ‘modernist’ glaze – to sell the same shaped jug in earthenware.
The J-7 jug has been documented by the Powerhouse Museum in Sydney: http://www.powerhousemuseum.com/collection/database/menu.php and appears on anniescollectables.com as being worth $138. I think it can be equally be used as a jug or a vase. I have styled it here with Gerberas.
The Diana jug/vase is for sale: $AUD95