This is the first locomotive modified by Ferrosur Roca railway. It is a hybrid between General Electric U-18C (chassis, bogies, traction motors, fuel tank) and EMD (body shell EMD GP-35 ex Chesapeake and Baltimore and Ohio), Engine GM 12-567C, main alternator, etc). The locomotive is seen behind the new hybrid 8121 is a General Electric U-13C (very similar but smaller than the U-18C transformed in the "new" 8121.
From a hint of "Bee" (NKP 765), colorful "Bees" (KCS), "Bees" w/ "attitude", to "Bees" that "sting" your eyes, in their own way they have "Bee" on display! Equipment that "Buzzes" with Yellow & Black colors! ("Bees" can still "Bee" entering this "hive"!)
