To give more context, the Sinatra-Jobim album was of course finalised right down to the mixing & mastering & even the cover art was chosen. The scheduled photo for the album was a shot of Frank leaning on the back of a Greyhound bus, taken from the same mid-February '69 photo session which produced the artwork for the albums My Way and A Man Alone. The LP reached the acetate stage & a limited number of 8-track tape editions were quickly fixed up & released to market. This recording was never commercially released in any other format.
For what ever reason, a recall was issued by Warner in the form of a memo ordering the destruction of all 3,500 of the 8-track cassettes that had been manufactured for release. Warner sent this memo to all retailers and distributors of the unsold copies, and even the sold ones! There are fewer than FIVE copies of the 8-track release known to still exist, and an auction way back in 2006 achieved a record sum of $4550 for one surviving copy.
Acetates or test pressings for the proposed LP are reportedly so scarce that the owner of one such rarity told Goldmine Magazine in a 1991 article that he wouldn't part with his for less than $5,000 even then. As far as we are aware, no examples of the acetate have ever surfaced at online auction.
Seven tracks from this aborted session eventually made their way onto side one of the Sinatra & Company album in 1971. Three of the Jobim songs which Frank was reportedly unhappy with, "Off Key“, "Song Of The Sabia“, and "Bonita“, remained unreleased. Fans had to wait until 1995 & 'The Complete Reprise Studio Recordings' for all ten songs from the second Sinatra-Jobim session to finally be made available one way or another, & even then these have since slipped out of print.