USS Dauntless (prototype)

The USS Dauntless (NX-01-A) was the prototype starship of the Federation science vessel. The Dauntless was based on the fake Starfleet ship of the same name constructed by Arturis, a member of Species 116, in 2374 using particle synthesis. When Starfleet returned to the Delta Quadrant as part of Operation Delta Rising, the Dauntless class was revived as a genuine Federation starship. 

History
As part of Operation Delta Rising, Starfleet launched the USS Dauntless (NX-01-A) in 2410.