I don't know whats makes you so excited to get yourself lambasted by me everytime here on this forum. Half baked knowledge and then jumping here and there with it won't make you Lord. If you have spade learn moves of spade rather learning moves of Ace and educating others about King. 12417 is ISO CERTIFIED train. It received ISO CERTIFICATE much before 12309 Patna Rajdhani. And as far as airi gairi trains are concerned I am not talking about 12273 or 12439 so better you make your way out of this blog Mr. Kaushal. When I will talk about these two trains I'll invite you for expert comment. And if you were wise enough you could have seen than 12393 which runs ahead of 12309 daily was left far behind 12309 and 12275 was stopped at DER for the first time to pass 12309 which never happens otherwise, 12275 is...
more... 12275 not 12273 so kindly excuse ! And between these years 12309 had trailed 12275 with 3 mins gap and had reached ndls behind 12275 only. Also 12417 was shunted in NR which does not happens otherwise.