[ Ref. David Miller in 220903 MMDigest ]

David, what you don't see are two passages under the cover that is
glued to the bottom of the valve. Bob Humes beautify documented his
build of a Wurlizter 105 band organ, his files should be available at

https://groups.io/g/Wurlitzer105andBandOrganBuilders 

If you can't get to them, I can send them directly to you. Attached
is a link to a screen shot showing these passages.

Steve Muscato 

 [ https://www.mmdigest.com/Attachments/22/09/11/220911_210214_humes_UnitValve1.jpg