The Guterman (NRC Sports) AG 604S Deluxe clone history:

In 2003 the Guterman's supplier (Xpider Co.) copied the Eagnas GB stringing machine to create the AG 604S Deluxe model.

2003 Eagnas GB II Price: $489.00 2 stainless steel thumb-adjustable clamps (PN-1002)		2003 Guterman (NRC Sports) AG 604S Deluxe Price: $569.00 2 aluminum, not thumb-adjustable clamps
1998 Eagnas GB Price: $545.00 2 aluminum clamps (PN-1008)		2000 Guterman (NRC Sports) AG 604S Price: $649.00 Import Eagnas GB, 2 aluminum clamps (PN-1008)