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For adjusting the mirrors there are two collimators. <snip> It consists of a small telescope, which fits the draw-tube at the eye-end. In the focus of the eyepiece are, instead of cross-wires, two adjustable terminals, between which an electric spark can be passed, generated by a small induction machine, like a replenisher, held in the observer’s hand.
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Sounds like an old school laser collimator to me
