Antique Brass Bed

Heavy brass 3" tubular bed. It has a 2 horizontal bars, one across the top and one across the bottom.  5 vertical center bars with "balls" in the center. These balls teir up in the center.  It has no markings other than a "R" on the end of each rale.  I am looking for ideas on the manufacturer, the age and the approximate value.  There is only 2 small dings in the top cap, other than that, in excellent condition.