How about checking your model/serial nr tag again and see if we can get passed the lack of "A" heartburn.
I don't have and manuals other than issued by Case. I understand the Jensales manuals are a direct copy of the original Case manual and the I&T manuals are pretty much useless. Can't prove either general impression by me.
Both these links are 1953 manuals, they may not have 100% of tractor's info but I don't know of any older service or parts manuals. I think either one on these manuals, along with the previously posted operators manual, will take care of anything that you will need to know.
The first link is a service manual provided by Mike Johnson, use the drop down menu. I don't know where mj is now, haven't seen a post from him here lately. 2nd manual is an on-line VA parts manual. You can also look up parts on the CaseIH parts site.