DR-9, DR-11 ) had a 6-sided cast body and no brand name ( 11 : 1 ratio, ) while there were others later on that more resembled Schaller ( stop screw to the inside, Schaller style buttons . ) or Grover tuners ( stop screw below but without the familiar crescent knob . ) Few of these sealed tuners were branded at all, while others in later years show " Sigma " stamped on their backs.
2.
DR-9, DR-11 ) had a 6-sided cast body and no brand name ( 11 : 1 ratio, ) while there were others later on that more resembled Schaller ( stop screw to the inside, Schaller style buttons . ) or Grover tuners ( stop screw below but without the familiar crescent knob . ) Few of these sealed tuners were branded at all, while others in later years show " Sigma " stamped on their backs.
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