Sancy Hope diamond. The Sancy was in the collection of Vasiliy Rudanovsky until 1828 when purchased by Prince Demidoff for £80,000. It remained in the Demidov family collection until 1865 when sold to Sir Jamsetjee Jeejeebhoy, an Indian prince, for £100,000. He sold it only a year later, creating another gap in its history. It reappeared in 1867, displayed at the Paris Exposition, carrying a price tag of one million francs; the gem then vanished again for forty years. The Sancy next surfaced in 1906 when bought by William Waldorf Astor, 1st Viscount Astor, from famous Russian collector A.K.Rudanovsky. The prominent
3M to the Sound 80 studios in Minneapolis. After drawing on the experience of that prototype recorder, 3M later introduced in 1979 a commercially available digital audio recording system called the "3M Digital Audio Mastering System", which consisted of a 32-track digital audio recorder and a companion 4-track digital recorder for mixdown & final mastering. 3M later designed and manufactured several other commercially available models of digital audio recorders used throughout the early to mid-1980s. 3M launched "Press 'n Peel" in stores in four cities in 1977, but results were disappointing. A year later 3M instead issued free samples directly to