Theodolite - Henri Dupuis , optique , instrument topographique de précision à niveau à bulle - 1928 - France

The Henri Dupuis theodolite, dating from 1928 and made in France, is a precision topographic instrument used for measuring horizontal and vertical angles in surveying. Incorporating a bubble level for accurate leveling, this theodolite exemplifies early 20th-century French craftsmanship in optical and mechanical engineering. Theodolites are essential tools in geodesy, engineering, and construction, enabling the layout and measurement of terrain with high precision. The level of manufacturing detail and optical quality often reflect the maker's reputation and the period's technology, making such instruments collectible artifacts representing the evolution of surveying equipment.