AT: "nt" Shuttle 12091 was a shuttlecraft used by Starfleet during the late 2250s of an alternate reality.
In 2258, Spock and his counterpart from another reality had a chance encounter near this shuttle, which was located in Hanger 1 at Starfleet Academy, following the destruction of the Narada. (Star Trek)
The number "12091" was a reference to Star Trek VI: The Undiscovered Country, which was released in December 1991. (citation needed • edit)