WW2 German Kriegsmarine Coastal Artillery badge by the much appreciated, amongst collectors, manufacturer Schwerin Berlin. Nava badges from Schwerin are reknowned for their high level of detailing, the way that they maintain their gilding / wash after many years and their robust hinge and pin set up (you dont find many with a broken / repaired reverse).
Note -> As always the problem with being a much appreciated antique badge is that they are also the first to be copied and reproduced. From the images shown below there is more than enough detail to make a comparison for authentication purposes.
German WW2 Kriegsmarine (Navy) Coastal Artillery badge produced by FLL 43. For whatever resaon these badges tend to maintain the gilding to the wreath very well but on the reverse tend to have what appears to be sloppy / excesive soldering. Pay particuar attention to the areas of Fine detail such as the waves and cannon as these areas are not easily falisfied.