Gary Galloway on January 25th, 2021:
If memory serves me correctly, this instrument was originally built for the Unity United Church of Christ (UCC) when that congregation moved to the suburbs, probably in the early 1960s. The organ was moved to Margaret Hank church by St. Louis Pipe Organ Company! Therefore, St. Louis Pipe Organ Company is the "Unknown builder" referred to. They are still in business and likely might have some record of moving this organ from its original church.
Gary Galloway on January 20th, 2021:
This church appears to have closed. No information about whether the organ is still in the building or not.
Database Manager on October 25th, 2010:
Identified through online information from Gary Galloway.