Provided with four apertures, without red open
-40 to 0 to +40 focusing lenses for better resolution.
With 2.7 V vacuum lamp.
Screw fitting for fast and secure attachment to the
Sturdy adjustment ring to turn the instrument head
to the ideal position on the handle.
Extremely impact resistant casing made of glass
fibre reinforced plastic.
Simple exchange of the lamp at the base of the