Original Imperial German WWI Captured Prussian EM/NCO M1915 Pickelhaube Spiked Helmet - Complete Swedish Militaria says it all:

says it all:

This example has a matching serial number 91272 on both the blade and the throat of the scabbard

and flew it subsequently in Italy and North-West Europe

This is a very lovely grouping attributed to a young Marine who served with the 65th Company

though some of the stitching has pulled out on the end of the breakaway flap

Original Imperial German WWI Captured Prussian EM/NCO M1915 Pickelhaube Spiked Helmet - Complete Swedish Militaria says it all:Original Item: Only One Available. This is a stunning example of an excellent condition M 1915 Imperial Prussian Line Infantry Mannschaften (other ranks or EM NCO) pickelhaube in good condition. The M1915 was the last model of Pickelhaube issued prior to the move to steel helmets. In accordance with the 1915 regulations, these helmets would no longer use brass, silver, or Tombak as the M1895 did. All issued Pickelhaube would now use gray oxidized