The Guterman (NRC Sports, Polo Sport) AG 603GB Deluxe clone history:

The Guterman's supplier (Xpider Co.) copied the Eagnas EAG-350 stringing machine to create the AG 603GB Deluxe model. But this factory does not want to invest the capital to design and create the mold for the oversized clamp, the AG 603GB Deluxe does not provide 2 oversized clamps.

2003 Eagnas EAG-350 Price: $429.00 2 oversized clamps (PN-7062), 2 tennis clamps (PN-7064), 2 badminton clamps (PN-7066)		2003 Guterman (NRC Sports, Polo Sport) AG 603GB Deluxe Price: $549.00 2 tennis clamps, but no oversized clamps
1997 Eagnas EAG-350 Price: $639.00 2 oversized clamps (PN-7062), 2 tennis clamps (PN-7064), 2 badminton clamps (PN-7066)		2000 Guterman (NRC Sports, Polo Sport) AG 603GB Price: $759.00 Import Eagnas EAG-350, 2 oversized clamps (PN-7062), 2 tennis clamps (PN-7064), 2 badminton clamps (PN-7066)