The headgears looks almost the same under the 30 is but in 1934 (24/3) the National Eagle shows up in front of the caps. The Kriegsmarine caps never used the twisted chin cords (except Administration) as they used in Army or Luftwaffe. From 1936 was tree type of Visor trims introduced Company Grade Officer, Field Grey Officer and Flag Officer. Kriegsmarine Administrative Officers have silver insignia. Remember that Kriegsmarine only stand for about 2% av Germans Military Forces and you understand that many things had disappear in the oceans over the world.