Hopf was a German guitar and bass brand.

Michael Hemken hand carves acoustic archtop guitars, violin, violas, and bows. He was born in Minneapolis, Minnesota in 1951 but moved California in 1974, where he began repairing musical instrument for musician friends. Two years later carved his first archtop guitar and violin. Since then he has maintained a limited production of one of a kind instruments. Michael is also a master electrician.

Source: Hemken Guitars website

Geneva International Corporation was a musical instrument distributer based in Wheeling, Illinois. The company was founded by Earl Matzkin to import pianos from Czechoslovakia. They also imported stringed instruments from China, Korea, Romania and the Czech Republic - and were the US distributer of Amada guitars until 1997. The company distributed Geneva branded acoustic guitars, made in the Czech republic, during the 1980s and 1990s.

Source: Geneva International Corp website (archived 2003)

Christopher J. Eccleshall is a maker, dealer and repairer of fretted instruments. He makes guitars, violins, mandolins, banjos and dulcimers to order. When he left school in Gosport the mid 1960s, Chris started an apprenticeship as a aircraft engineer but soon left to work as an assistant to a violin maker, John Howard-Lucy in Hastings for three years. He then moved to London to work with Hills of Bond Street before moving to Ealing Strings on Uxbridge Road in 1968. At Ealing Strings he had the opportunity to do some guitar repairs and eventually he left to set up a guitar business of his own in 1971. Before long he was doing work for Clapton, Townshend, The Sweet and Rory Gallagher. Eccleshall is now based in Devon.

Source: Eccleshalll Guitars website (6 April 2017)

Venson brand instruments were made by the Korean Sungbo Industrial Company. There were Venson branded electric guitars and basses, acoustic guitars and basses, banjos, mandolins and electric violins.