Whoo hoo! These arrived today - I bought them a few weeks ago and actually forgot about them, so it was a very nice surprise when they arrived this morning.
They are Chilton's
Motor Age covers from 1958. The designs are really modern and graphic. I especially like the gauges on the November cover and the giant 59's used for December's.
Reading some of the articles and seeing no cover price, I get the impression it was a trade publication sent out to mechanics and car dealers (I could be wrong about this so if you know different please let me know).