Hello, many thanks to you too for your description.This was usefull for me. Step by step i'm founding some information. I have to notice (I don't know if it is only a my feeling) about chrisler is hard to seek informations. Anyway I found a web page very interesting and i'm tryng to contact author. I report it for anyone will needs something like me :
http://www.ckdeco.com/chryslerbuilding/index.html
It remains as problem the picture very rare of interiors of spire. Some like a cutaway. or a plan.