Hello Dave
According to the book "Italian aces of WW1" (roberto Gentilli,antiono Lozzi & paolo Varriale) A shiffer military history book (excellent!!!)
Te nieuport 17 flown by Barraca on Winter 1916/17 when he was at 70a/91a squadriglia was
The first Nieuport 17 of French production supplied to the 70a squadriglia on 21 October 1916
Barraca used it until April 1917
It was overall silver finish with the national colors below the wings(red /metal below left wing and green /metal below right wing
and on the rudder(green /white/red from front to back)
It was the first plane known to sport the famous "prancing horse" emblem, in black on both sides of the fuselage
The original french serial number appeared on the rudder (N 2614) together with the weight data, in french.
You will see a profile of the N17 here
Nieuport 17
I hope this can help you
Cordialement
Bruno