Vintage Classic Pocket Binoculars - Vintage Collectibles

Vintage folding opera glasses or compact binoculars, likely manufactured in Japan. They are sometimes referred to as "sport glasses" or "theater binoculars". Key Information Type: - Folding or collapsible binoculars/opera glasses. - Optics: The visible marking indicates they are (2.5×25%), which likely corresponds to a 2.5x magnification and a 25mm objective lens diameter (25mm is typical for this style). - Origin: Most of these chrome or black metal folding glasses with these specifications were produced in Japan from the 1950s to the 1970s. - Use: The low magnification of around 2.5x to 3x provides a wide field of view suitable for indoor events like the opera, theater, or concerts.  Size: 4.5"×2.5"×0.75"