A Tristan libretto fills a lacuna in my Wagner collection, and I found the Art Nouveau design irresistible.
I purchased a Lucia di Lammermoor libretto in the same style primarily for the sake of this full page ad: Nicely done, Knabe Pianos.
My discoveries then skip several decades, to this stark (and purse-sized!) 1961 Peter Grimes.
Later in the '60s comes this: a reminder of the Met's touring company, with a long description of how the under-construction Kennedy Center was funded and dedicated on the back cover.
Apparently, the Opera Orchestra of New York used to provide commemorative libretti at each of its performances! Not a few of these have found their way to Westsider Records; most of them seem to have been underwritten by Rolex. Some of them featured a photo of Eve Queler on the cover; some, like this one, had a design inspired by the opera in question. This sleek edition of the sublimely ridiculous La Gioconda libretto was too good to pass up.
I need to do further research to find out what year saw this gala performance of Tancredi... with Marilyn Horne!
Last but not least, a libretto from a performance of the too-rare Freischütz in the NYPhil's anniversary season under Sir Colin Davis' baton.
Really, it's a good thing I'm moving soon, or who knows what else might follow me home.