Antique Butchers Sink Dentist Spit Sink Porcelain Enameled Over Metal , Heavy

This is a very nice heavy porcelain over possible cast iron drainage or sink . I believe either it was used in a butcher shop where a grinder would attach to it and the meat would drop in the tragedy and then would drain or it was in a old dentist business and this was the rinse spit sink . Either or it's a great old item