Rolex Explorer II 16570, 3185 vs 3186 movement

Showing how to differentiate if your explorer is having the 3185 or 3186 movement.
1) Wiggle test: adjusting the hour hand forward and backward on 3185 will "wiggle" the red gmt hand while the 3186 remains stable.
2) Crown rotation: 1 full rotation of the crown on 3185 moves 5 hours while 1 full rotation of the crown for 3186 moves at least 8 hours.

This is what I read from websites and it seems to be true, test done on my 16570 M series with Rolex Branded Rehaut vs my friend's 16570 Z series without RBR.

Видео Rolex Explorer II 16570, 3185 vs 3186 movement канала 76yuyuan