|Earth Pre-Federation Database - Declaration Class|
|U.S.S. Enterprise||XCV 330||
||Early spacecraft. one of the first space vehicles to bear the name Enterprise. An image of this historical vehicle was displayed on
the rec deck of the refitted original Starship Enterprise.
Star Trek: The Motion Picture
This ship was designed by Matt Jefferies for a television series project developed by Gene Roddenberry after the run of the original Star Trek. Unfortunately, the series was never produced, and this remains the only appearance of the design.
Star Trek Encyclopedia II
|The Star Trek Spaceflight Chronology (1980) features a side-view drawing and a detailed painting of the Enterprise. This however might not
even be the same ship. Only the overall shape is similar. The book includes the following descriptions:
USS Enterprise - Declaration Class 2123-2165. Length: 300 m, Weight: 52.7 mil. kg, Ship's complement: 950. Propulsion: Adv. Second Generation Warp Drive. A total of 957 of these warp 3.2 starliners were built for the Cultural Exchange Project of the United Federation of Planets. The Enterprise was the first ship to be equipped with a subspace radio and was the most popular passenger carrier of its time.
It should be noted that in the timeline of the Spaceflight Chronology, for example, the Federation was incorporated in 2087 and the USS Enterprise (NCC-1701) was launched in 2188. So in the canon timeline, this Enterprise would have to be placed somewhere in the very late 22nd to the early 23rd century, well after the time of Star Trek: Enterprise.
Text from the Memory Alpha, the free Star Trek reference