Germany 1918 - 1945 Allgemeine-SS helmet with metal decals
A German RZM pattern 1934 made helmet with original black paint and metal decals attached. The SS decal is certainly re-painted, the national decal looks to have its original paint. Assmann sold metal decals to attached to helmets (see metal fire brigade decal in this auction) and there is evidence that they also existed for the SS.
The liner and chin strap do look matching. No markings.