From the September 1967 issue of THE DIAPASON: A new shop-project tracker organ has been built by Abott & Sieker, Los Angeles, CaL on a second priority basis to familiarize shop organists with this type of instrument. The organ consists of 10 stops, 12 ranks. An open house on October 7 will feature the instrument in recitaL As far as can be ascertained, this is the only two manual tracker organ ever built by a southern California firm.