yes, it will come in the origonal box with all wiring instructions, wiring loom, sensor, clips, grommits etc as the day it left the factory.
only the gauge itself had been removed from the box to be fitted into a panel for a mini feature with FF.

model number i believe (by the sticker on the side) is: ST3307

or this one: http://www.demon-tweeks.co.uk/Motors.../1771/151/1751