A "one-second" high-precision instrument used for primary triangulation and geodetic surveying.
The , particularly the iconic Microptic series, is celebrated for its precision engineering and compact design. Originally manufactured by Hilger & Watts Ltd in London after their 1948 merger, these instruments set a high standard for land surveying and meteorological observations. Core Manual & Operating Procedures hilger watts theodolite manual
: For work in tunnels or after dusk, the manual described a battery-powered lamp that could replace the mirror, turning the theodolite into a glowing beacon of math in the dark. 4. Battles Against Nature particularly the iconic Microptic series
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