Rare Kriegsmarine marked helmet chinstrap made by firm Carl Tesch, Berlin, 193? dated

Very rare Kriegsmarine marked  helmet chinstrap made by firm Carl Tesch, Berlin. The chinstrap made from a thin leather and has been two times marked with eagle and M by the sides of the producer marking. The producer mark reads:... ltesch Berlin 1938 or 1939 year (bad visible). Completed with the aluminum studs and the buckle. The buckle remains a dirt on it, but it’s easy to clean. Very soft and pliable leather with no cracks, just a traces of a hard use/soiling. Extreme rare to find KM marked chinstrap. Will fit to M 16/18/35 helmet.