I have come up empty on trying to find the ww2 uniform insignia and anything else that might have been issued upon completion of training. Looking for battery A 505th CA AA. Also were there any company graduation or battalion photos taken .I have seen a couple for air corp but not artillery.

The insignia would depend upon the 505th's assignment.  IF it has attached to Army or Corps or to another level of authority.  Some AAA units had a rondel with AA inside it.  The AAA units surrounding Antwerp had their own.  I would start with the HQ to which the 505th reported..  Do you have any photos of indiviudals in the 505th?  Can you see what they were wearing?

The 978th Engineers, wore the shoulder insignia of the Ninth Army even though they had been assigned (kind of loaned out) to the XIXthe Corps (which had its own insignia) 

Interesting 

http://cdsg.org/wp-content/uploads/pdfs/FORTS/CACunits/CACinsignia.pdf

http://cdsg.org/wp-content/uploads/pdfs/FORTS/CACunits/CACRegInsig.pdf

http://cdsg.org/wp-content/uploads/pdfs/FORTS/CACunits/CACreg2.pdf

http://cdsg.org/wp-content/uploads/pdfs/FORTS/CACunits/CACorg2011.pdf

Great posts.  Thank you for these.  

12 hours ago, theron said:

I have 1 picture no insignia or anything on shirt--I got info from Eisenhower Library but can't determine unit break down---battalion mentioned but not batteries.... Archives said no unit history destroyed---By the way did you get the information on the ships involved that were listed in info I got from Eisenhower Library.