Close; the 8 behind the G is the model year of boat, not the day of the month.
ie; if a vin was ALT02B13J889 = it would be the 113th XB-2002 built in October of 1988 as a 1989 model year boat.
I know they do not use that resin anymore so that's not on the new boats and I'm not sure about the other sticker....