Shure Brothers has an extensive library of documentation for their microphones --
past and present.
The Shure S-36 refers to the 1950s tear-drop (ArtDeco) desk stand for microphones.
The 1950s era model 97u29 refers to the Shure 510MD and S36 stand which were sold as the Fixed-Station Dispatcher to many LMR mfg ( GE, RCA, Motorola, etc.).
Shure 510MD Series (Rudak) -- 4,000 ohm Zhttp://www.shure.com/idc/groups/public/documents/webcontent/us_pro_510md_ug.pdf
Shure 510C & 510S series (Hercules) -- 100,000 ohm Zhttp://www.shure.com/idc/groups/tech_pubs/@global_managed/documents/webcontent/us_pro_410_ug.pdf
Current Shure classic designs (in production)http://www.shure.com/americas/products/microphones/classic/index.htm
Some microphones models are highly prized and restored by collectors (broadcast, PA, movie/TV, music industries), the Shure 55 "Elvis" microphone celebrated it's anniversary this past year with special limited editions.Harmonica demand for the old Green Bullet (model 520) microphone was so great --
it was put back into production in 2009.http://www.shure.com/americas/products/microphones/classic/520dx_green_bullet_harmonica_microphone
User Guides for discontinued microphoneshttp://www.shure.com/americas/support/user-guides/discontinued-products/microphones/index.htm