Model
Number
Paint
Heritage
Number
Notes
SD50S
NS 6500
NS
NW
6500
SD50S
NS 6501
NS
NW
6501
SD50S
NS 6502
NS
NW
6502
SD50S
NS 6503
NS
NW
6503
SD50S
NS 6504
NS
NW
6504
SD50S
NS 6505
NS
NW
6505