Ah, yes! NOW we are getting somewhere.
"The game's afoot."
A few good questions remain. Is that an open 16, or something played low on a divided keyboard? Adri has written Quintedena 16. Or is it Prestant 16. or even Bourdon 16? Perhaps I can do a demo to help you there.
Seems like your specification is getting clearer. But still questions remain... two manuals, or three? Is there anything that
demands three manuals in what I have posted, if such a divided stop exists? If Adri is right that the organ has about 25 stops, where does all this leave you? Besides confused.
But there is another hint in the piece by Carson Cooman. Step back....listen. The notes Adri remarks are "missing"...not missing on the keyboards - there is no short octave. That melody, and those harmonies... Never mind the stops for a moment, and listen to the music. What does it say?
Where on earth is this organ, and who built it?
You are on the trail - go find the answer.