In the top part of a double boiler set over water boiling on high heat, combine clam juice, butter, celery salt, and Worcestershire sauce. Once butter melts, add the oysters and cook for 30 seconds, stirring constantly. Add chili sauce and stir well. Add half-and-half and cook for a few minutes until the cream is hot and almost simmering, but not boiling.

Add a slice of white toast to a warm 9-inch soup bowl and underline with a slightly larger plate. Using a slotted spoon, transfer oysters over the toast in soup bowl. Pour soup over the oysters, filling to about 1/4-inch beneath the rim. Garnish with a dash of paprika and serve with oyster crackers.