Searching for elusive 20th-century script typeface, metal or phototype, early 1970s

Question

I’m officially stumped. 

 

I was forwarded a sample taken from the cover a print piece from the early 1970s. These initials are paired with lowercase letters that resemble Primadonna (or some very similar disconnected script) and a subtitle set in Lydian. Overall a very 1950s vibe, yet published in 1974.

 

I’ve already consulted Daylight Fonts, Solotype, Fonts in Use, and a few other sources, but have come up empty.

Answer 1

Hi Kevin, with the exception of Q and S, these are from Hermann Zapf’s Virtuosa, see this specimen.
Not sure what’s going on with the two outliers. Maybe they are from a different typeface?

Comments

I found another specimen: turns out that the Q and S are from Virtuosa, too. These simpler forms are from a smaller size.

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Obviously I didn't dig far enough into the similars for Primadonna. Thanks for the ID.

Virtuosa was used for the lowercase in the original as well.