Updated by Paul Marchesano, listing this website as a source of information: https://www.dnainfo.com/chicago/20171016/edgewater/saint-ita-catholic-church-st-bing-crosby-organ-pipes-beach-hotel-henry-j-schlacks.
Article about Bing Crosby donating money for the original installation.
Identified through online information from Randall Karstens. -- The organ has Electric-slider chests in the Swell and Choir. Electro-mechanical chests are used for unit stops for these two divisions as well as the Solo. The orgiginal Wicks chests are still used in the Great, with some additions of other electro-mechanical chests. I am looking up the updated specification to see if there are any changes to the numbers of ranks, stops, and pipes.