Victorian Era Butter Dish Silver Plate With Knife Holder Ornate

Elegant and ornate butter server from New Amsterdam Silver Co. (see photo for maker marks) from the mid to late 1800s. Pretty floral design. 5 inch diameter interior. Not certain if there ever was one, but there is no interior glass dish. One handle is bent downward (see photo). When I purchased 3 years ago, the appeared sparkling new (it had obviously been cleaned). Since then, it has developed a lovely warm patina, but would be easy to retore its orinal finish.