Hi, I've been given a car seat which although very tidy, has very few stickers on it - over zealous cleaning? Under the cover it has GCP P3284A imprinted, but on a sticker it has LAPZ0046D. It also says not to use after December 2013 imprinted. I would like to know what model it is & track down instructions as it is a long time since I have used a carseat. It is for occasional use for my grndson who is 5months old. Many thanks, Kay