The Kaesler family arrived in South Australia as Silesian pioneers, migrating to Barossa Valley in the 1840s. Some of the original gnarled, dry grown Shiraz vines still remain and provide the backbone for the intense wines produced from the sandy loam soils of the estate's prime viticultural block. Old Vine Shiraz is an assembly of four parcels of old Shiraz vines grown to Kaesler vineyards. A Shiraz that will never be overtly fruity, it is best suited to those who prefer a solid, chewy wine with a savoury style and good solid structure.

The Kaeslers did not make their own wine until quite recently, traditionally selling grapes to Seppelt. Today's Kaesler springs from a worldwide search for a property to produce the best possible grapes for red wine. Shiraz is hand harvested during the chill of morning, off three distinguished vineyard blocks at Marananga and Nuriootpa, averaging fifty years of age. Fruit is treated to ten days of open ferment on skins and daily pumpovers twice daily. Batches are pressed into a selection of seasoned and new French oak hogsheads for twenty three months maturation, regular rackings and top ups, before assemblage and bottling without any fining or filtration, the emphasis on an extreme style of Shiraz.