Sterling Silver Sikorsky CH 53 Helicopter Model Amazing sterling silver Sikorsky CH 53 helicopter model. Beautifully executed with great attention to details as a Sikorsky CH-53 Sea Stallion helicopter. This item was made in the electroforming method. A beautiful decorative piece that will surely highlight your display cabinet and make a wonderful addition to any silver collection. Measurements: Height: 8.5cm. / 3.346in. Length: 33cm. / 12.992in. Width: 30.5cm. / 12.008in. Weight: 520gr. / 16.718oz. Marks: 925 for sterling silver.