As suggested by Stub: we will list information sources for various Intercoms and Interphones below:
A) 38 pages. AE Intercoms, Auto-Com, Idealfones, Serv-U-Fones, P-A-X, Monotype manual and magneto systems.
32A47, 32A48, 33A17, 33A18, 33A10, 34A16, 32A1, 32A21, 35A5, 32A14, AM-10 Outdoor Monophone, AM-21 Flush Wall Telephone, Switchboards, Monochime, Extensicord.
Contributed by Ken Stubblefield. OCR by Clint Gilliland.
http://tinyurl.com/ld88z7d (http://tinyurl.com/ld88z7d) ( found to be a dead link on 7-19-2019 )
Dave
Here's the link to the TCI Library to replace the dead link.
https://www.telephonecollectors.info/index.php/search?q=ae+catalog+4033&Search=
stub