This is a follow-up to yesterday's post. Here's a great exterior illustration of Capt. Pike's Enterprise from Neale Davidson's Jaynz Ships of the Fleet.
"Captain Christopher Pike commanded the Enterprise from the early 2250s into the 2260s. His missions included voyages to the Rigel, Vega and Talos systems."
The Vintage Starships site even has the specs for the ship, at least as far as the FASA RPG is concerned.