The helmet rim is butt-joined and spot welded at the rear.
Really nice and crisp date and manufactures mark are on the inside rear of the shell; Ulbrichts Witwe in Kaufing 34, 4690 Schwanenstadt (U SCH). That Austrian eagle is very cool.
The helmet with the "erbsentarn" side of the fabric camouflage cover, secured by a band made of a rubber inner-tube.
The camouflage cover is two-sided with distinctly different patterns: "erbsentarn" on the left and "sumpftarn" on the right.
Instead patterns were sent to individual units to convert pieces of shelter halves into covers. Mats excellent helmet cover site at: http://www.matshelmets.se/at_cov.html provides more details on this and other camouflage covers.