Alternate Reality
(split 2233)

The USS Salcombe (NCC-2107) was a 23rd century Federation starship operated by Starfleet.

This ship was docked at the Starbase Yorktown shipyard when the USS Enterprise-A was being built. (Star Trek Beyond)

The Salcombe was visible in a time-lapse montage when the Enterprise-A is shown being built. It was named after the lead CGI artist on the montage, Rhys Salcombe. This fact, and the ship's name and registry, are from information tweeted by TrekCore in October 2016. [1] [2]