Johannus.com Creation Date: 1996-01-25 | 82 days left. Register domain Key-Systems GmbH store at supplier with ip address 37.34.56.44 The sixteenth-century Price Revolution in Spain induced by the gigantic stream of Mexican and Peruvian silver was followed by a century of alternate inflation and deflation resulting from wars and weak governments. But in spite of frequent, long, and unsuccessful wars, monetary stability characterized the first half of the eighteenth century. Opus 370. Thanks to its beautiful sound and contemporary console, the Opus has been the world's best-selling Johannus organ for many decades. Available in two- and three-manual versions, the Opus is the perfect organ, whether you are a learner or a more experienced player who simply wants to make beautiful music.