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Old 23 September 2022, 06:14 AM   #1
GST15
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Question on Amplitude on GMT 3285 movement

I have been reading about the inner workings of watches, and recently purchased a timegrapher. I have about a dozen higher end watches, including 4 modern and several vintage Rolex, Omega, Cartier and Breitling.

My Rolex GMT Master ll, purchased from my AD in 2020 is running between 0 and -2 Spd, 0 beat error and at the correct 28,800. The problem, (if it is one) is that the amplitude is running between 220 and 245. I have read that the amplitude should fall somewhere between 275 and 310, which is where my other (3) 32XX
movements fall.

Is this something that I should be overly concerned with of should I just monitor its behavior, since I have 3 years remaining on the factory warranty. I am inclined to do this, since it is pretty much running perfectly.

Thanks for the help.
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Old 23 September 2022, 06:41 AM   #2
amanbra
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Question on amplitude- 3285 movement

Hey youíre about to go down a rabbit hole but at least you can keep a close eye on your watch.

Warning there are a fair few here that deny there any issues with the 32xx. They will chime in.

Firstly what amp you mentioned for it to be worth anything you need to state if itís are full wind or 24 hours etc and what position your watch is in.

Have you set your lift angle to 53?

Officially what you need to test is after 24 hrs does your watch hold 200 amp in all positions.

For me though the first giveaway is a change in time keeping since when the watch was new. Has it changed for you? Do you wear it enough to be able to detect a change?


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Old 23 September 2022, 07:24 AM   #3
GST15
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Quote:
Originally Posted by amanbra View Post
Hey youíre about to go down a rabbit hole but at least you can keep a close eye on your watch.

Warning there are a fair few here that deny there any issues with the 32xx. They will chime in.

Firstly what amp you mentioned for it to be worth anything you need to state if itís are full wind or 24 hours etc and what position your watch is in.

Have you set your lift angle to 53?

Officially what you need to test is after 24 hrs does your watch hold 200 amp in all positions.

For me though the first giveaway is a change in time keeping since when the watch was new. Has it changed for you? Do you wear it enough to be able to detect a change?


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Thanks for your reply.
The readings are fully wound with the dial in the face up position.

Lift angle is at 53 (I did look that up)

I really don't wear it enough to detect a change, but it has always been +or- a couple seconds, as I have checked on my phone clock over 24 hrs in the past.

I will report back after 24 hrs. to see if it falls below 200.

Thanks again
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Old 23 September 2022, 07:37 AM   #4
amanbra
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Question on amplitude- 3285 movement

Quote:
Originally Posted by GST15 View Post
Thanks for your reply.
The readings are fully wound with the dial in the face up position.

Lift angle is at 53 (I did look that up)

I really don't wear it enough to detect a change, but it has always been +or- a couple seconds, as I have checked on my phone clock over 24 hrs in the past.

I will report back after 24 hrs. to see if it falls below 200.

Thanks again

Okay so fully wound dial up and an amp of 250 is definitely in the low side. When my watches have done that they were at the initial stages of decline and struggle to hold 200 after 24 hours in a vertical position like crown up or down. See how you go but this is the beauty of a timegrapher you can catch it early.


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Old 23 September 2022, 07:45 AM   #5
GST15
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Quote:
Originally Posted by amanbra View Post
Okay so fully would dial up and an amp of 250 is definitely in the low side. When my watches have done that they were at the initial stages of decline and struggle to hold 200 after 24 hours in a vertical position like crown up or down. See how you go but this is the beauty of a timegrapher you can catch it early.


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Thanks. I will report back and keep an eye on it.
Has the Rolex fix had any real success to this point?
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Old 23 September 2022, 09:16 AM   #6
amanbra
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Quote:
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Thanks. I will report back and keep an eye on it.
Has the Rolex fix had any real success to this point?

No one knows because Rolex donít say anything and the watchmakers in this forum have gone quiet. With many late model watches going bad we do suspect that they donít have a full handle on it but again we donít know for sure.

I have a dj that has been in twice now to rsc. This second visit is going well at the moment for me but it hasnít been a year since coming back so again who knows.

Iím one of the roulette players with this movement. Had/have 9 32xx now.


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Old Yesterday, 02:09 AM   #7
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Well, after 24 hours, still dial up:
-2 spd (consistent with its performance over the past 2 years with occasional use)
Amplitude is at 220
Beat error is 0.1ms
28,000

Any thoughts Graham? or anyone else.
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Old Yesterday, 08:08 AM   #8
amanbra
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Question on amplitude- 3285 movement

Quote:
Originally Posted by GST15 View Post
Well, after 24 hours, still dial up:
-2 spd (consistent with its performance over the past 2 years with occasional use)
Amplitude is at 220
Beat error is 0.1ms
28,000

Any thoughts Graham? or anyone else.

What was it crown up or down? Dial up at 220 Iím going to guess crown up or down will be about 190 ish. Technically out of spec if thatís the case.

If itís fine when youíre wearing keep wearing it. Based on what we know it will get worse over time after you see this. If it has always run like this maybe you have a low amp movement for this one but one that actually keeps time okay.

Check it again after a year or when you notice itís different to what youíre use to.


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Old Yesterday, 08:40 AM   #9
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I'd be taking it in more than likely. Check over the next two months first perhaps.


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Old Yesterday, 08:44 AM   #10
GST15
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Quote:
Originally Posted by amanbra View Post
What was it crown up or down? Dial up at 220 Iím going to guess crown up or down will be about 190 ish. Technically out of spec if thatís the case.

If itís fine when youíre wearing keep wearing it. Based on what we know it will get worse over time after you see this. If it has always run like this maybe you have a low amp movement for this one but one that actually keeps time okay.

Check it again after a year or when you notice itís different to what youíre use to.


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Graham,
Thank you for your assistance. I will take your advice and monitor it over the next year. I'm sure that I will eventually send it back for service under warranty.

You are kind for taking the time to help me out.
Regards
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Old Yesterday, 08:46 AM   #11
GST15
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Quote:
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I'd be taking it in more than likely. Check over the next two months first perhaps.


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Yes. I'm sure that I will. I appreciate the response
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