Add the stock, milk, potatoes, Worcestershire sauce, dry mustard powder, allspice, celery salt, thyme, seasoning salt, white wine and poultry seasoning. Allow to simmer and thicken, stirring occasionally. Cook until the potatoes are cooked through, about 25 minutes. During the cooking break up the potatoes with the back of a spoon to make large chunks. Serve warm with chopped hard boiled egg sprinkled over.