AT: "nt" Military 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 designation of "Military Shuttle" comes from the shuttle's wall accents, which reads "UFP MIL-SHUT-12091".