Description 20 mm Ralley Strap No 386 very nice generic Heuer style Ralley Strap, German made by Jürgens Germany (sorry Heuer dont offer a 20 mm tang buckle strap, thats why we made this 20 mm Strap for our Collector customers), made from black Calf leather, 20/18 mm 190 mm long, 5.5 mm thick, No Buckle , this strap is made to work with any 18 mm tang buckles and ss clasps like the Heuer FC5014. A great Strap matching to your Collectors watch,