Special Features:

11.750 in. Dia; one 1.750 in. Diameter eye piece section; one 1.750 in. Diameter objectice section; two 5 ft extender sections; one right angle prism head; one fitted wooden instrument case; one transformer unit w/cables; three spare 10 v/7.5 amp lamps

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.