cORRECT. Koch had the 50m wr 6.11i at Grenoble in 1980, but she never held the world record for 100y or 100m.
She’s in a similar boat to the American Laurence “Lon” Myers who set 100y WR of 10.0 twice in 1880 and he also held the 330y and 300y WR and also the 440y record, as well as the 600m and 1000y wr. bUT FOR SOME REASON HE NEVER SET A RECORD AT 220Y OR 200M.