Antique Double Cast Iron Swing Arm Lantern Sconce Holder. This double sconce antique wall mount can be used for oil/kerosene lanterns or candles. This piece measures approximately 13 1/2 " L and the top holder which is the widest part of the piece measures approximately 5 1/2" Wide. The cast iron piece is very ornate-beautifully crafted. If you want an authentic cast iron sconce for your Victorian home, the double swing arm lantern holders are generally harder to find. This piece presents superbly with no signs of significant wear or rusting.