It is either a GE clock radio or a Zenith -- being that I can't really see it from the front, I can not tell exactly which. GE made several clock radios during the 60's and early 70's that were AM only, big clear dial on the right, clock on the left. Speaker on the bottom, plastic grille across the front. The earlier ones were tube and then they went transistor, keeping the clock the same and the grille the same and the dial the same.
Zenith had a similar model, with a slanted style grille similar to the one in the pic. It had the speaker in the middle like the pic does. The Zeniths I've seen had smaller tuning dials, though.
Of course, it's possible it's a completely different brand and just looks like the GE or Zenith ones I am familiar with. It's probably a mid to late sixties clock radio, though, and whether it has tubes or transistors probably depends on the year.