I don't know if this pie crust ever failed, since Mom almost always used frozen pie crusts (and this was back when frozen pie crusts were truly awful). Mom was great with most things, but the two things she was unable to master were biscuits and pie crust. However, the recipe is lightly stained, so she may have used it at least once. It's in my handwriting.
3 cup flour
1 tsp salt
1/2 cup cold water
1 cup shortening
1 egg
1 tsp vinegar
Cut shortening into flour and salt. Beat egg adding water and vinegar. Add liquid to flour mixture. Roll onto lightly floured board.
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On the reverse side of the card is this recipe, cut out from a a magazine or some other publication:
Cookie Crust Pastry: Stir 1/4 cup margarine to soften; mix in 1/4 cup sugar and 1 egg yolk. With pastry blender gradually mix in 1 cup flour until crumbs form. Press firmly into jbottom and sides of 9-inch pie plate. Bake in 400F oven about 10 minutes or until edge is browned. Cool.