Rare! J. MASON Worcester, Mass. Mahogany Sighting Level – c. 1850

27.5″ mahogany example with push-up sights at each end. Unsigned but the attributes are unmistakable to Mason’s style of levels. All three vials are full and working. See pages 117-118 of American Levels and their Makers by Don Rosebrook for more information. Mason’s levels rarely appear for sale.