This is a pair of Sport Glass 2.5x25 M/M opera glasses.
The case is scuffed and the lenses are slightly dusty. There is some rust on the metal around the bottom of the left lens and inside the case. Pushing in the metal latch on the case will reveal the glasses. The dial at the front can be turned to change the focus of the glasses.
The dimensions of the case (folded up) are around 11.5x6x2cm.