Started at ~6:55 am start. Watch (Sunnto 9) crashed at 6:07'33 at the top (which must be ~13:02 pm). Elevation gain done was 3913 m, 77 m each = approx 51 laps.
~13:11 pm restarted watch and new activity log. 5:59'33 duration, though I left my watch on for a few minutes at the end. Elevation was 3171 m, 77 m each = approx 42.
The end time (19:10) minus the start time (6:55) = 12:15 hrs, with 7,084 m elevation gain. That means the last lap doesn't count.
Last lap was at 12:09:07 hrs. But the previous lap was finished at 11:57:22.
Therefore, count all laps, and minus 1 for the 12 hr FKT: 50 in Part 1, 42 in Part 2 = 92 laps. Minus 1 is 91 laps.
91 laps x 77 m each = 7,007 m elevation loss and 7,007 m gain.
I measure a lap to be 77 m +/- 0.5 m since I measured 92 laps for a total of 7084m which is 77.0 m per lap.
I did this run "unsupported", however:
1) I brought a bag with me which I left at the bottom, and carried it back up within the 12 hour time limit.
2) Someone stole 2 bananas from my bag; my wife replaced it with approximately the same calorie/water content.