Amish Sugar Cream Pie

1 9" unbaked pie shell 

3 tablespoons flour 
1 1/2 cups sugar 
1/8 teaspoon salt 
1 1/2 cups heavy cream 
1 tablespoon butter, melted 
1/2 teaspoon vanilla 
1 dash nutmeg 
1 dash cinnamon 

Preheat oven to 425 degrees F. 

Combine ingredients. Pour into pie shell. Bake at 425 for 10 minutes, reduce heat to 325, and bake for 45-55 minutes more, wrapping edges of pie crust with foil, if necessary, to prevent excessive browning. Cool completely before cutting.