"Ah one, and ah two..." It's LAWRENCE WELK!
Lawrence Welk (1903-1992), born in the German-speaking community of Strasburg, North Dakota, was an American bandleader who hosted "The Lawrence Welk Show" from 1955 to 1982. His style came to be known as "champagne music". His parents emigrated to America in 1892 from a German-speaking area of Russia (now part of the Ukraine.)
In the 1960s the Thomas Organ Company was at the height of its popularity. The company became the importer of the English-made Vox combo, the electronics of which would turn up in Thomas models. Thomas also took over manufacturing rights of the Moog synthesizer and enjoyed heavy celebrity endorsement from the likes of Lawrence Welk, whose organist Bob Ralston both played a Thomas organ on "The Lawrence Welk Show" and on tour at organ and piano shops to demonstrate the greatly improved tonal quality of the new models.
In 1968 Lawrence Welk had a high-end model Thomas Organ named after him: the Lawrence Welk spinet model.