No other markings. The barrel has a beautiful deep blue and bore. Here are two pics:
http://vickersmg.com/images/misc/IMG_7960.jpeg
http://vickersmg.com/images/misc/IMG_7961.jpeg
It is possible that Vincenzo Bernardelli (VB) made spare Enfield barrels? VB was an abbreviation used by Bernardelli on pistols and it seems the Italian Army and Navy received No. 4 Mk. 1's post WWII.