🔹"R" is sometimes not written on any of the places viz., short hood or long hood or both sides large font or both sides near LP/ALP window. I have also seen such locos and updated the same in IRI. But we have to suffix "R" while adding loco tag even if there is "R" in one of the places which is informed above
🔹@Prabhat Sharan: You can see previous picture in this loco page which shows "R" along with loco number