Original document from William Barnes. Source: Website of Orgelbau Klais Bonn 2017-02-01
Iowa City, Iowa University of Iowa - Voxman Music Building Organ by Orgelbau Klais Bonn Opus 1929 2016 III/57, mech./elekr. I. Hauptwerk C-c4 II. Oberwerk C-c4 16 Principal 16 Stillgedackt 16 Bordun 8 Fugara 8 Octav 8 Dolce 8 Gamba 8 Rohrflöte 8 Doppelgedackt 8 Gemshorn 8 Hohlflöte 4 Geigenprincipal 8 Quintaton 4 Flauto 8 Bifara 2 Waldflöte 6 Quinte 2 2/3 Sesquialter II 4 Octav 2 Mixtur III 4 Spitzflöte 16 Aeoline 3 Quint 8 Clarinette 2 Octav Tremulant 2 2/3 Cornett III-IV 2 2/3 Mixtur IV-VI 16 Trompete 8 Trompete III. Schwellwerk C-c4 Pedal C-g1 16 Salicet 32 Bordun 8 Geigenprincipal 16 Principalbass 8 Lieblich Gedackt 16 Violonbass 8 Flaut Amabile 16 Salicetbass 8 Vox Angelica 16 Sub Bass 4 Fugara 8 Octavbass 4 Flauto traverso 8 Cello 2 2/3 Nassat 8 Gedacktbass 2 Piccolo 4 Octave 1 3/5 Terzflöte 4 Mixtur IV 2 2/3 Progressiv Harmonica III-IV 32 Fagott 8 Trompete 16 Posuanenbass 8 Oboe 16 Fagott Tremulant 8 Trompetenbass Couplers II-I, III-I, III-II, I-P, II-P, III-P
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