That's tough to say really. They didn't really come out with the hour glass shape until like 83 or something like that. It could also be Luvs. Luvs is a economic brand of pampers. It looks to be for boys as the padding goes up to the top so far and looks thicker than the back. Then it could be a store brand. Its pretty hard to tell.
They are not luvs as they are not sold in my area of Canada.
I have done some more looking and I think they are pampers for boys as the elastic is blue and I got lucky and picked up some girl's pampers a full pack size large and they look identical.except that the elastic is pink and they have a tapeing panel with prints.