SLAP SHOT 1977, Poster Credits Typeface

Question

Looking to identify the typeface used for the credits on the one-sheet of 1977's SLAP SHOT, seen on this image in boldface and regular/slim. There are characteristics of several different fonts, but I can't track down the exact thing. Any help would be appreciated. Thanks!

(also posted on WhatTheFont)

Answer 1

ITC Ronda, as identified on Fonts in Use.

Comments

Thank you, kthomps5, I appreciate your speedy response.

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yes, was just going to write that, and the early use of seems to have the alternative M readily available.

https://fontsinuse.com/uses/25006/anthony-burgess-paperbacks-ballantine-books

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Thank you switzer_b, much appreciated. After heading over to Fonts In Use, I learned that there were numerous variants, as well, not to mention the lower-case. Any idea where I could find those? Letraset or Letragraphica sheets, maybe? Or Homage to the Alphabet?

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Yes, this specimen is from Homage to the Alphabet 

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Yay! Thanks, Stewf, that's terrific.  If you know of any source for the variants, please let me know.

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I don't think they've been digitized for ITC Ronda, and I doubt Monotype will ever invest the time into it. If it’s the ‘R’ you’re into check out Bonkus.

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Stewf, not just the 'R', but the whole daggone thing; boldface, thin, alternate letters, etc. It's really a hobby for me, like collecting baseball cards only way more geeky.