Since the interior dome has been repainted, it is likely a postwar reissue, such as Norwegian IMO. Also, the color is off for a period German reissue. Depot reissues generally used a textured green gray, slate gray, or blue gray (Luftwaffe).
Period reissued helmets and period camos very rarely had interior domes painted. Conversely, postwar reissues usually had original liners removed and interiors painted.