SP SD50 page:
The SP never received any SD50's proper, but at least 7 of D&RGW's units were repainted into SP's speed lettering scheme. Sadly, it appears that none of the repainted units operated with its original gyralight intact.
SP ex D&RGW SD50's:
| SP number | D&RGW number | const. number |
| SP 5504 | D&RGW 5504 | 847022-4 |
| SP 5510 | D&RGW 5510 | 847022-10 |
| SP 5511 | D&RGW 5511 | 847022-11 |
| SP 5513 | D&RGW 5513 | 847022-13 |
| SP 5514 | D&RGW 5514 | 847022-14 |
| SP 5516 | D&RGW 5516 | 847022-16 |
| SP 5517 | D&RGW 5517 | 847022-17 |
SP 5504 847022-4 9/1984 ex D&RGW 5504 SP 5510 847022-10 9/1984 ex D&RGW 5510 SP 5511 847022-11 9/1984 ex D&RGW 5511 SP 5513 847022-13 9/1984 ex D&RGW 5513 SP 5514 847022-14 9/1984 ex D&RGW 5514 SP 5516 847022-16 9/1984 ex D&RGW 5516 SP 5517 847022-17 9/1984 ex D&RGW 5517