Fabe, ....No, probably French, Belgian or Danish with the plastic inner helm....but not West German, they did not have an Army until 1955, and their first steel helmet was an M1 clone, the "M56 Zweiteilige" helm...........see here..
Prost ! Steve.
"The German Army is the perfectly adapted, perfectly running Machine. The difference is that the Germans are organised with a view to War...with the cold, hard, practical and business-like purpose of winning victories."
G.W. Steevens - The Daily Mail (1897)
Btw., the price is around 25 USD...
It is definately a French mle51, an early edition. Production of these was farmed out all over France, to assist regional economic development. This one is is by Menesa, from Neunkirchen in the Saar, a frequently disputed border area between France and Germany. At the time it was under French control, though later in the 1950s returned to Germany. This is a very nice early mle51, from a hard to find maker. And also, I think, one of the minority produced that has the 'hook' element of the chinstrap on the right rather than left. A nice one - I envy you!
I believe the camo cover is from a later period and would not have been originally issued with a helmet of this vintage.