My father z'l received this recording from Mr Joseph Katzenstien z'l in the early 1990s. It has the distinction of the style of the previous generations of shul choirs who sang at a very slow and deliberate pace. Chazan Hermann Lieber was leading and his directives and tempo counting can be heard in this recording. The recording also has one of only two known recordings of Rav Breuer zt'l speaking.