In 1919 two brothers, Marthinus and Niels Momberg, bought Middelvlei and moved their families onto the farm. A year later the first wines were pressed, mainly fortified at that stage. Their two sons, Stiljan (quiet Jan) and his cousin, also Jan but called Jan Bek (because of his more outgoing and voluble personality), inherited the farm in 1960. In 1963 Stiljan bought his cousin's half share in the farm, to become sole proprietor. Jan Bek went on to buy nearby Neethlingshof Estate and subsequently entered politics. Over the next thirty years, Stiljan set about establishing one of the model wine farms in the district.