CJ, Having used just such a machine I can vouch that they are more than capable of drilling very small holes, and equally very large ones with equal ease. We usually sed the radial drill because of component size and the relationship of multiple holes. As you can see in the 11th and 12th photos rthere appear to be 2 very large fabricated structures on the drill. The drilling arm has in this case both a large radial sweep and an extended table to allow it to traverse along the length of such a large structure. Thus it could give accurate repeatability when drilling and tapping.
Robert the magnetic base drill was available in those days, but was mostly used in stuations where a component or structure couldn't be mounted under a fixed machine. or where a horizontal hole needed drilling in an existing piece of structural steel etc.
Much has changed since these photos were taken but they do give a real sense of engineering atmosphere to those who were there, and I believe to those who have never experienced "engineering" on that scale. Don't you just love the pictures of the guys standing on the saddle of their lathe. I remember watching one of my colleagues turning extremely long and large diameter spindles on such machnes. He used to sit in a folding chair on the saddle and travel with the tool post, pouring tea from a thermos. Some cuts used to take several hours for one pass.
Remember there is a clear heirarchy among the workers in these photos, which can be seen from their overalls. Boilers suits mostly machinists. Brown coats possibly a foreman, white coats, inspectors. White coats and a hat….managers.
Those WERE the days. I hope you all enjoy the pictures.