I sometimes wonder why YouTube isn't made more use of in here. Ravel's own alleged recording of the "Bolero" was uploaded there in 2019 and has already had over 6,000 views. I say "alleged" because there's an essay under the video which states that Albert Wolff had a hand in the recording, though this appears to be something that has already been discussed in the past. At any rate, the timing is just under 16 minutes and strikes me as somewhat lugubrious ...
https://www.youtube.com/watch?v=E__RMXWy4Jo
At the other end of the scale, Stokowski's 1940 All-American Youth Orchestra recording at 12 minutes suffers from a low-level transfer and much manipulation of the volume levels for each solo instrument at the start. This was recorded on two 10-inch 78s (four short sides) which doubtless accounts for the tempo adopted ...
https://www.youtube.com/watch?v=p3o-wiS16jk
As to Celibidache, there are half-a-dozen performances by him on YouTube, with several different orchestras over the years, and with timings ranging from around 17 to 20 minutes, so take your pick! ...
https://www.youtube.com/results?search_query=Celibidache+Ravel+Bolero+
Evidently, Toscanini's 14-minute reading didn't please the composer but I think I prefer it to the oh-so-slow versions out there ...
https://www.youtube.com/watch?v=HiYIiPWZ6cQ