An antique treen sycamore flummery mould, popular in Essex.  Note the carved flower, to inside base. Flummery was a popular 18th century dish, a recipe from The Experienced English Housewife by Elizabeth Raffled 1769,  
says it contains bitter, sweet almonds, rose water/ calfs foot stock - which is drained through a piece of muslin, loaf sugar and thick cream.
It could also be used as a butter mould, turned from one piece of wood, it measures approx 13.5cm in diameter and 6.5cm in height.