Single Diamond-shaped Collar Tab (Kragenspiegel) as intended for the OT - 'Organization Todt'. The OT was established in June of 1938 when the Inspector General for Roads, 'Dr. Fritz Todt', was tasked with the construction of the 'West Wall'. The 'OT' monogram is machine embroidered in red on a olive drab wool backing. Nice example in good unissued condition!