History of Baratza. Virtuoso introduced, the first conical burrs grinders branded with the Baratza name. Maestro and Maestro Plus updated: 2007: Upgraded the Maestro and Maestro Plus. 2008: Introduced the Vario, a light commercial grinder with flat ceramic burrs and micro/macro adjustment. 2010: Introduced the Preciso, a conical burr grinder with …