Cuirassier helmet maker

I have a Cuirassier helmet that is all steel, with no brass besides the wappen. The maker stamp is "?AMASCHK(E or F)" and the date stamp is 1916. The first and last letter of the name is partially covered by the washers of the spike base attachment studs. Is anyone familiar with this maker and if so, what is the full name. Many thanks.
 
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