Special Features:

4 interchangeable heads; bulb; ext light attach; 12x mag; 1 in. Focal l; field of view 20 deg; reticle 0.3 in. Range, 0.005 in. Div; 0.500 in. Score dia; w/ light 0.750 in. ; 12 in. Working l

Properties:

A viewing device used to visually inspect items such as cannon bores, internal combustion engine cylinder walls, propellant perforations of rocket motors or similar items, for defects of manufacture, corrosion, scars, erosion, etc., without the necessity of disassembling the item(s). It may or may not have extension tubes to cover the various ranges of inspection. The item is basically a straight-tube telescope using a mirror or prism.