The lenticular shape of the plate derives from Hellenistic types produced in the Syrian-Palestinian area and intended for high-class clients, which are not widespread in the Piedmont area and more generally in the Cisalpine area. The specimen is placed side by side with another similar plate, now lost, from the nearby Roman necropolis of Trofarello (Turin), while a fragment from Pollenzo (Bra, Cuneo), coming from a tomb dating back to the end of the 1st century BC. and the beginning of the 1st century AD, documents the variant with the insertion of small mosaic squares. The glass manufacturing of these complex products has not yet been identified, the location of which has been hypothesized in north-western Italy and Rome, in the latter case recognized on the basis of the discovery of semi-finished products. The plate was found in 1879, reused as a lid for a vase in the tomb of a male figure dating back to between the end of the sixth and the first half of the seventh century AD.