Beautiful work!.
They call that technique 'cesello' over there (I may have the spelling wrong.
Both the technique and the small tools , think tiny shaped punches,,used to form the raised surfaces take on that name.
Instead of removing more metal besides the lowered background surfaces to gain relief qualitys to the work,,the punches are used to shape the steel and form it and even raise edges into shape.
Small details are added with single and multiple line tools to finish up as well as going back over and recutting the features to clean up any edge lines needing smoothing out.
The scarce areas left in a smooth high polish like the cylinder flutes and other small details within the pattern itself only add to the contrast.
It's a lot of work as any relief engraving is, but the results when well done are obviously spectacular.
The 'INC' after the name is abbreviation for 'Incision' (engrave(r). Again I might not have the right spelling there. I have problems enough w/English.
From an engravers reference I have (1980):
Revera Vasco was born in Gardone ValTrompia in 1939.
At that time ('80), resided in Marone, Brescia
I get the idea he stayed freelanse, did a lot of work for A&S (Abbiatico & Salvinelli) as as well as other small out put/high grade makers in that area.