Well we all realise that most of the NASA photos of unmanned spacecraft being assembled, tested and integrated were not digitalized and those available on the Internet are mostly low-resolution.
Just wanted to point out a good source for these, now collectable, NASA photographs:
http://www.apollomissionphotos.com/
Especially take a look at:
http://www.apollomissionphotos.com/mariner
the feedback of customers speaks for itself !
Philip