Reminding us of the kind of kids’ storybook viewer into which slot circular wheels of film frames, this similar retro feel device likewise features two eyepieces, and indeed two lenses. Where it ...

This is a brass instrument with pearl on the barrels, eyecups and center focus. The barrels are flared. The objective lenses are 30 mm in diameter. The length is 5 cm closed. The words “Jumelle ...