Rolex 3185 vs 3186 Movement

[SteelSubmarinerGuy]

I have a Rolex Explorer 2 16570 which I have performed the "Wiggle" test on and the GMT hand does in fact move, so i assume it has the 3185 movement. But I also have the Rolex GMTMaster2 BLNR which is suppose to have the 3186Cal movement but when I performed the "Wiggle" test on it the GMT hand if fact moves on it as well!! I'm confused!!

[Watchzombie]

Please try the crown method for the 16570. What is the series of your exp 2?

There is also the Crown test posted at http://www.minus4plus6.com/paracromblu16710.htm#crown

Essentially it is as follows:

The Crown Method

Another method for discerning a 3185 with the 3186 movement is through the the Crown Rotation Method. This method is another way to discern the type of movement without having to remove the caseback. Because the calendar and hour-hand setting mechanism was redesigned in the 3186 movement, the number of turns of the crown to turn the 12 hour hand is different on a 3186 than it is on a 3185.



To perform this test, unscrew the crown such that the crown is in the hand setting position. With the crown face-up, count how many hours the hour-hand travels with one full revolution of the winding crown.


3185: one complete crown revolution makes the hour hand jumps 6 timezones/hours
3186: one complete crown revolution equals 8-9 timezones/hours

[padi56]

Originally Posted by SteelSubmarinerGuy

I have a Rolex Explorer 2 16570 which I have performed the "Wiggle" test on and the GMT hand does in fact move, so i assume it has the 3185 movement. But I also have the Rolex GMTMaster2 BLNR which is suppose to have the 3186Cal movement but when I performed the "Wiggle" test on it the GMT hand if fact moves on it as well!! I'm confused!!

Well first on the early 3186 they did have a few problems with the movement but rectified by Rolex. If its got a 3185 for one complete crown turn the second time zone hand will jump around 5-6 hours on the 3186 around 8-9 hours.But little difference in both movements so know big deal either way.