Stamped "ET17" and "4455" on the interior of the shell which is finished in rough slate grey. Replacement liner is marked "Kopfweite:Gr.59/Stahlhem:GR.71" and "Baumuster: Heisler, Berlin C2/Hersteller: F.W. Müller jr." The splinter pattern camouflage cover is unmarked, with a stitched-on herringbone twill band for foliage mounting. Good overall.