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A distinctive addition to a vintage surveying instrument collection, this Wild Heerbrugg double-prism optical square features the maker’s “WILD HEERBRUGG SWITZERLAND” marking. Its black cylindrical housing, internal glass prisms, and ribbed handle reflect the design of traditional handheld surveying equipment.

Pre-owned, with visible scuffs, surface wear, and dust. Untested; working condition and accuracy have not been verified. Includes only the instrument shown. Please review the photos for condition and approximate measurements.

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