In Tchaikovsky's Symphony No. 6 (Op.74), near the end of the first movement, at rehearsal "S" there are numbers written above the notes for the 1st violin part (ref. upper right in image). What do those numbers mean?

I do know what numbers above notes mean in piano sheet music but not in an orchestral score. Also, I am aware that the "3" under the beams refers to triplets. Thanks!