Vintage Compact New In Box Swift Princess Opera Glasses/Biniculars. Swift 3x25mm Princess Roof Prism Binocular is designed for the theater and opera when viewing at closer ranges than usual. Theatre glasses feature 3-power magnification and have a wider field of view than regular binoculars do. The Swift 3x25 Princess model features gracefully flared barrels with a lustrous cloisonne-type finish. Swift 3 x 25 mm Princess Binoculars feature distinguished gold plated trim and black drawstring case. Purchased in the late 90s and still in original box.