Antique Keleket X-Ray Localizer / Depth Gauge, Kelley-Koett Covington KY, Early Radiology

A brass-based precision instrument stamped KELEKET — the Kelley-Koett Manufacturing Company of Covington, Kentucky, America's pioneering x-ray apparatus maker from 1900. Localizers and depth gauges like this were used to triangulate the position of foreign bodies and lesions from radiographs before the age of imaging guidance. Early radiology instruments are scarce and highly collectible.