a quick search found this 
 
"GECO- was a firearms retailer in Berlin. Gustave Genshow & Company. 
  
Just as many companies made guns for Sears, several makers made guns for GECO. Most commonly, J P Sauer und Sons. But there were others (Simpson is one). Some were made in Germany, some in Belgium. 
 " 
Proof marks should at least identify the country of origin 
 
I did find a current Hungarian company website for MG-STAHL - no way to know its the same company 
 
Stahl translates to steel
		 
		
		
		
		
		
		
			
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				"If there is a heaven it must have thinning aspen gold, and flighting woodcock, and a bird dog"  GBE
			 
		
		
		
		
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