[Arran]

I have a National Sixty Special that's a bit of a beater, and found some information online about them, I think it's from about 1959-60. My impression is that it is somewhat better made then a Hallicrafters S-38E?, at least the cabinet and chassis are, but it's still made to a price. Most of the capacitors are not paper, they are reddish-brown "chiclet" style, the rest may be paper mylar or just paper since they appear to be molded black Sprague ones, the filter caps are in a typical "toilet roll" one like most 1950s AC/DC sets have. The IF cans were not made by National, Automatic/Miller K-trans, though the front end coils may or may not have been I don't think they were), the tube sockets are the typical phenolic wafer ones used in loads of AC/DC radios at the time. Mine has the black cabinet, some come in a grey cabinet, and allegedly blue as well, made out of heavier gauge steel then the Hallicrafters S-38s of the time, the chassis slides out the front, two screws hold it in from the back, and two on the bottom, once the back is removed. 
Regards
Arran