Detroit, Michigan from 1988
From the builder's web site: "Helderop Pipe Organs was formed in 1988 to provide pipe organ service for the Great Lakes Region. What began as a tuning and repair service has now become a full service organ building factory. Located in the heart of Detroit, in a renaissance industrial complex, Helderop Pipe Organs continues to be a leader in quality instruments."We received the most recent update for this note from Database Manager on April 09, 2020.