Please, everyone Thanks for all your responses, but most of you have mayonnaise in your recipes
The potato salad I am thinking of was thin sliced, obviously had vinegar and a ? little sugar, and was sprinkled with a very small amount of parsley. There wasn't any egg, or other additives, or spices that I remember. I am quite sure that there was NO mayonnaise. It's possible that there was pickle brine, but certainly not sweet pickles.
Anyone who is younger than 75 need not answer!!!!