Differences between the 3135 and 3186?

[C. Davidson]

What are the differences between the 3135 caliber and the 3186 caliber?* I'm looking for technical specifics.

The 3135 pic from this link:

The 3186 pic from this link:

*Please forgive me if this has been asked before.

[Ironstark]

The 3135 is the basic date just/date gents movement. The 3186 is the GMT II/ Explorer II movement. The calender mechanism is different from the date just/date, as is the jumping hour mechanism on the 3186.
As far as the basic movement is concerned, you can see from the pictures that the 3186 has a "parachrom" blue hairspring fitted to the balance. The winding bridge also has the calibre number engraved on it.
The design/construction of the movements (apart from the cal mech etc..) are the same and most of the components are interchangeable.
The balance/hairspring are not interchangeable, Rolex will NOT retrofit a "parachrom" equipped balance to a movement that should not have one.

[Imtiaz]

Hi Chris

Great photos and good question.

[C. Davidson]

Thank you Ironstark.

[JJ Irani]

I see a difference of 51!!

[C. Davidson]

Originally Posted by JJ Irani

I see a difference of 51!!

[sheldonsmith]

There is a difference in the train wheels between the 3185 and 3186. It is noticeable when one moves the hour hand, there is less play on the 3186, and the hour hand moves faster with one full rotation of the crown than the 3185.

• 3185: one complete crown revolution makes the hour hand jump between 5 to 6 hours
• 3186: one complete crown revolution jumps 8 hours

Apparently, this is one way to determine a 3185 from 3186 without removing the caseback.

There is a difference here, but don't know if it is the actual wheels (thicker teeth) or whether they are lined up differently.

[Vanessa, any insight?]

-Sheldon

[ed54]

Interesting photo- Most of the photos of 3135 movements I've seen have had the classic red gears showing, but this photo does not. Is the movement partially disassembled in the photo?
Ed

[Micha]

.

[Micha]

Originally Posted by sheldonsmith

There is a difference in the train wheels between the 3185 and 3186. It is noticeable when one moves the hour hand, there is less play on the 3186, and the hour hand moves faster with one full rotation of the crown than the 3185.

• 3185: one complete crown revolution makes the hour hand jump between 5 to 6 hours
• 3186: one complete crown revolution jumps 8 hours

Apparently, this is one way to determine a 3185 from 3186 without removing the caseback.

There is a difference here, but don't know if it is the actual wheels (thicker teeth) or whether they are lined up differently.

[Vanessa, any insight?]

-Sheldon

wow, that's very interesting...
can anybody confirm that, or are you 100% sure?
ty

[JJ Irani]

Originally Posted by Micha

wow, that's very interesting...
can anybody confirm that, or are you 100% sure?
ty

100% sure! Already been confirmed by many TRF owners!

[sheldonsmith]

The image on top of the 3185 is one with the automatic winding mechanism (and the teflon coated wheels) is removed...

-Sheldon

[Micha]

Originally Posted by JJ Irani

100% sure! Already been confirmed by many TRF owners!

Thanks, since this will save me a trip to my AD. Just bought an M-Series GMT 16710 (with the 3186 movement), which I wanted to verify upon arrival of my new toy...

[sheldonsmith]

All M series are 3186's. Great watch!

[Ironstark]

The jumping hour mechanism on the 3186 is a different design to that of the 3185. Without getting too technical, some of the gears and some of the bridges in the calender mechanism have been modified.
The mechanism was altered to improve its function and make the jumping hour more "positive" in the 3186.
As for the gear train or the rest of the movement (apart from the other parts I listed above) it is the same.

[Rolex116520]

Originally Posted by Ironstark

The 3135 is the basic date just/date gents movement. The 3186 is the GMT II/ Explorer II movement. The calender mechanism is different from the date just/date, as is the jumping hour mechanism on the 3186.
As far as the basic movement is concerned, you can see from the pictures that the 3186 has a "parachrom" blue hairspring fitted to the balance. The winding bridge also has the calibre number engraved on it.
The design/construction of the movements (apart from the cal mech etc..) are the same and most of the components are interchangeable.
The balance/hairspring are not interchangeable, Rolex will NOT retrofit a "parachrom" equipped balance to a movement that should not have one.

Hi,
Sorry if I got this all wrong, but does the deepsea fitted with the 3135 mouvement not have the blue parachrome hairspring ?

[Ironstark]

You are right, the Deepsea is fitted with a parachrom hairspring. I did`t mention it as I never think of it as a normal 3135!!
The Deepsea, the Daytona, the Milgauss, the Day-Date II, GMT II and Explorer II (3186 movements) are all fitted with a parachrom hairspring. It is not possible to have it retro fitted to any movement that should not normally have it.

[Rolex116520]

Originally Posted by Ironstark

You are right, the Deepsea is fitted with a parachrom hairspring. I did`t mention it as I never think of it as a normal 3135!!
The Deepsea, the Daytona, the Milgauss, the Day-Date II, GMT II and Explorer II (3186 movements) are all fitted with a parachrom hairspring. It is not possible to have it retro fitted to any movement that should not normally have it.

When you say that you do not consider the Deepsea as a normal 3135 , does that mean that the 3135 mouvement has been subjected to particular modification for it to be fitted in the 116660 ?

[Ironstark]

No I just don`t think of it as a "normal" Rolex!!

[tomee]

Originally Posted by sheldonsmith

There is a difference in the train wheels between the 3185 and 3186. It is noticeable when one moves the hour hand, there is less play on the 3186, and the hour hand moves faster with one full rotation of the crown than the 3185.

• 3185: one complete crown revolution makes the hour hand jump between 5 to 6 hours
• 3186: one complete crown revolution jumps 8 hours

Apparently, this is one way to determine a 3185 from 3186 without removing the caseback.

There is a difference here, but don't know if it is the actual wheels (thicker teeth) or whether they are lined up differently.

[Vanessa, any insight?]

-Sheldon

just confirmed this, my 03 exp II, only jumps 6 hours with one crown rotation

[sheldonsmith]

My 3186 jumped 9 hours with one crown rotation (had to do this to change the date to July 1).

There we have it... 3185 = 6 hours to one crown rotation
3186 = 9 hours to one crown rotation

-Sheldon