13-642 TOPOGRAPH ABNEY LEVEL

The 6-1/4" Topographic Abney Level features all-brass construction on a square sighting tube with internal focusing telescope. It comes with dual interchangeable arcs: one arc graduated in percentage-of-grade/degrees (bi-directional, 0 to 60°) and one graduated in percentage-of-grade/topographic scale. Vernier reading to 10 minutes. Includes belt-loop case.