Unusual Swift 7x42 binoculars, made in Japan and professionally calibrated/modified by Davin Optical Ltd, England.

These are not standard Swift recreational binoculars. They feature an internal measuring reticle / graticule, visible through the eyepiece and shown in the photographs.

Specifications / markings:

* Swift 7x42

* Field of view: 114m / 1000m

* Made in Japan

* Internal reticle / measuring graticule

* Davin Optical Ltd, England calibration label

* Calibration distance: 4.1 metres

* Part No: 4256-00025 / 1-40-4

* Code No: 121-100 ISS 1

* Serial No: 0000231

The binoculars appear to be specialist calibrated optical equipment, possibly intended for technical, industrial or measurement applications.

Optics can be viewed through and the internal reticle/graticule is clearly visible.

Used condition with cosmetic marks and signs of previous use. Please study all photographs carefully for the exact cosmetic and optical condition.

No case or additional accessories are included unless shown.

Due to the specialist nature of these binoculars, their original specific application is unknown and they have not been tested for calibration accuracy.