I figured some GCI experts out there could answer a few questions for me.  I just bought a 1963  GCI but the label says Model AR-6100.  Are all GCIs essentially AR-6100s???  What does AR-6100 stand for.  The back side of my slate is an orange/rust color.  I haven't seen that color on my Anniversary or GCII.  Anyone know what that's about?
Here's my label:
		
		
	
	
		 
	
				
			Here's my label:
 
	 
 
		 
 
		 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
	 
 
		 
 
		 
	 
	 
 
		
