Muscat Hamburg Muscat Hamburg is varietal of the European grape species Vitis vinifera which was developed in 1850 as a cross of Schiava Grossa and Muscat of Alexandria. R. Snow of the United Kingdom developed it, one of the few European varietals to be bred beyond the latitude which most winegrapes can flourish. Wines: Shenandoah Vineyards Amador County Black Muscat NV