Bausch & Lomb Model 90 Alidade & Case

This Bausch & Lomb Model 90 "Topographic" High Post Plane Table Alidade was manufactured in Rochester, NY, circa 1914–1916 during the "Triple Alliance" era. The instrument features an 18-inch black-finished brass blade, a telescopic sight with brass accents, and integrated leveling vials. It is housed in the original suitcase-style mahogany case, which includes internal felt-lined bracing and the original lock and key. The instrument remains in very good condition with minimal wear to the finish and mechanical components. The mahogany case exhibits typical, age-appropriate shelf wear, including minor scuffs and surface scratches. H 5.75", W 19.25", D 9.25". From the collection of Dale Beeks. Please see photos for condition.