Last updated: 1 November 1997 Numbers Number Model Notes 101,102 2 SLUG 1201 1 SW900 1202 1 SW1200M 1501 1 SD7 1551 1 SW1500 1801,1803 2 GP9 1852 1 SD9 2301-2317 17 GP39-2 3001,3002 2 GP40P-2