In a large bowl, combine flour and salt; cut in butter until mixture resembles coarse crumbs. Combine egg and vinegar; add to flour mixture. Add water, 1 tablespoon at a time, until dough forms a ball.
Divide dough in half. Roll out one portion to fit a 9-in. pie plate; transfer to pie plate. Trim pastry even with edge; set aside.
In a large bowl, combine peaches and lemon juice. In another bowl, combine 3/4 cup sugar, flour, cinnamon and salt; stir in cream. Pour over peaches; gently toss to coat. Spoon into crust. Dot with butter.
Roll out remaining pastry; make a lattice crust. Seal and flute edges. Sprinkle with remaining sugar.
Bake at 425° for 15 minutes. Reduce heat to 350°; bake for 45-50 minutes or until peaches are tender and crust is golden brown. Cover edges with foil during the last 15 minutes to prevent overbrowning if necessary. Cool on a wire rack.