The Guterman (NRC Sports, Polo Sport) AG 607 clone history:

In 2003 the Guterman's supplier (Xpider Co.) copied the Eagnas Hawk 880 stringing machine to create the AG 607 model.

2003 Eagnas Hawk 880Le Price: $509.00 2 stainless steel thumb-adjustable clamps (PN-1002)		2003 Guterman (NRC Sports, Polo Sport) AG 607 Price: $699.00 2 aluminum, not thumb-adjustable clamps
1998 Eagnas Hawk 880 Price: $669.00 2 aluminum clamps (PN-1008)		2002 Eagnas Hawk 880 II Price: $599.00 2 stainless steel thumb-adjustable clamps (PN-1002)