Seco Swiss-Style 62 mm Nodal Point Prism Assembly The Seco 6406-00 Swiss-Style Prism Assembly is a high-quality, GPH1-compatible solution designed for precise surveying and control applications. Featuring a 62 mm copper-coated prism , it delivers consistent, reliable distance measurements while maintaining accuracy in demanding field conditions. The removable target enhances visibility and flexibility for a range of setups. Configured with a -34 mm prism constant , this nodal point assembly supports accurate positioning and alignment in standard survey workflows. Its Swiss-style design ensures compatibility with common mounting systems and accessories used in precision measurement applications. Key Features • 62 mm copper-coated prism for consistent measurement performance • -34 mm prism constant for standard nodal point applications • Swiss-style (GPH1 compatible) design • Removable target for flexible field use • Height to center (HT): 86 mm • Ideal for surveying, control, and monitoring applications