for Vespa 125 VNA2 2??/ VNB/ GT/ GTR 1??/ Super/ TS 1??/ 150 VBA 2??/ VBB/ VGLA/ B/ GL/ Super 1??/ Sprint/ V 1??
black
square cut out Product description
The round or square opening in the oil seal enables rinsing the bearing with gas-oil mix. The opening shape is irrelevant for it’s function: an oil seal with a round opening can be installed in a motor that formerly used an oil seal with a square opening.

OEM numbers (for comparisons):
084644 (PIAGGIO)
84644 (MOTOVESPA)