AFAIK
DLI dep 05.05; JP arr 10.40; JP dep 14.00; DLI 19.35 via AWR till 1997
then DLI dep 05.50; JP arr 11.45; JP dep 14.15; DLI arr 20.20 via RGS from 1997-2002. Permanently service withdrawn from 2002. I remember seeing 00501 & 00502 at DLI when I went to Delhi for Surgery in 2002