The Guterman (NRC Sports) AG 603S Deluxe clone history:

In 2003 the Guterman's supplier (Xpider Co.) copied the Eagnas GA stringing machine to create the AG 603S Deluxe model.

2003 Eagnas GA II Price: $599.00 2 stainless steel thumb-adjustable clamps (PN-1002)		2003 Guterman (NRC Sports) AG 603S Deluxe Price: $699.00 2 aluminum, not thumb-adjustable clamps
1998 Eagnas GA Price: $599.00 2 aluminum clamps (PN-1008)		2000 Guterman (NRC Sports) AG 603S Price: $799.00 Import Eagnas GA, 2 aluminum clamps (PN-1008)