This interesting piece of eye wear is a pair of Eschenbach Tele x3 Magnification Spectacle Binoculars.
They are in excellent used condition and were made by Eschenbach, a premier German manufacturer of telescopes, binoculars and visual aids for the visually impaired.
They were bought for my visually impaired mother-in-law to enable her to watch the television more easily. They work fine but she found then too heavy for the bridge of her nose and only wore them twice!
Being x3 magnification, these little binoculars offer hands-free viewing with a nice bright image. Pretty useful for outdoor sedentary activities e.g. bird watching and fishing, as well as a visual aid.
Specification:
Magnification: 3x
Lens Type: Galilean
Lens Material: Achromatic lens system
Mount: Black Plastic
Frame length: 15.5 cm
Lens Size: 2.4 cm
Focal Range: From 70 cm to infinity (not suitable for close up work)
Field of view: 160 m / 1000 m (9.5 degrees)
Pupillary Distance Range: 54-74 mm which can be locked in place via the two screws on the adjustable bars. I would check the distance between your pupils prior to purchase to ensure that they are suitable for you.
Weight: 70 grammes
Miscellaneous: cold bend wire-core temples and an adjustable saddle bridge.
