Leica “Builder” T100 electronic theodolite with a digital display panel and keyboard. Detachable carrying handle. Metal and plastic painted yellow. Three screw levelling head. User manual. Used for measuring horizontal and vertical angles in land surveying and for setting out works.
In 1987 Wild Heerbrugg merged with the optical firm of Ernst Leitz GmbH. Subsequently it acquired a majority interest in Kern in 1988 and was renamed Wild-Leitz AG in 1989. It became part of the Leica holding company in 1990 (ref Wikipedia).