This looks like Greco Bold, from samples in the Solotype Catalog and Jaspert's 'Encyclopaedia of Type Faces'. I am not sure if I can find an online sample, but I think that's your type here.

BTW, the Agfa-Monotype version is not quite the same, and is all-caps. For some reason their own sample is not available for viewing right now. I will try to scan the Jaspert sample to show you.

Here's a scan from the Jaspert book of Greco (or Bristol) from a Gans 1925 typeface. You can see the A and C are like the sample, and the lower case matches as well, in as many common characters as are shown. Unfortunately this sample doesn't show the entire character set, but I think it shows enough to make the case. Note that the stroke of the right leg of the A is simpler than the Agfa-Monotype 'Greco' from the link I gave previously. Apparently the newer Monotype/Linotype versions exaggerated that feature, or else developed a solid version of the Adornado face that is not the same as Greco Bold. (The Linotype version was called Vulcan, but looks almost identical.)

It is Greco Bold, but the e's have been tilted slightly. I know this for a fact because I have worked with the original artwork files for the logo and happen to know the designer who did it. The artwork, incidentally, was created by scanning from a type specimen book, not with an electronic version of the font.

Mark, thanks for the confirmation. Do you know if the original face was ever digitized? The FontHaus versions that Agfa sells are just versions of the Adornado design, and are all-caps.

I think FontHaus has (or had) all of them, but they were not very well done. I don't know of any others. There was also at one time a Linotype face called Vulcan which was probably a knock-off of Greco. It looks more or less the same, but with differences in detail. It's different enough, though, that it would not match the PHC logo.

Thank you both, Mike and Mark, for your help!