1970's here, but not the UK.
Having a genuine barbie doll, not a knock off from the supermarket.
Ditto having barbie accessories - like the swimming pool, wardrobe and bed. (Alanna, I'm looking at you. . .)
Having store bought clothes, and not hand me downs. I'm telling you, wearing a vinyl coat that my sisters had worn in early 1960's, in the mid 70's was not fun.
Smoked salmon - Mum was livid when she presented it at a buffet dinner, and was told 'nice trout Marj'!'
Having proper adidas sneakers.
Having a haircut with a flicked fringe, instead of a bowl cut.
Having shampoo and conditioner.
Going to town - all dressed up to the nines, and we would have, with great ceremony, lunch at a tearooms, where one could choose between a ham roll, or a pie, or a sausage roll, one cake, and a drink - which could be that height of sophistication that was Viennese coffee - which was filtered coffee with cream in it, or a milkshake, even.
Buying a brand new car - we bought one and it was the talk of the village for weeks, with dark mutterings about how my parents must be loaded, and how they were profiteering as the local pub owners. It was quite dodgy going to school there, for a time.