Losing time

[deano19980 54]

Hi all,

   I bought a SCG rose gold Daytona with a 7750 movement at the beginning of November and it is already losing time, today it has lost 15 minutes in 5 hours. Can anyone help with somewhere i can get it looked at or what the issue may be.

Dean.

[GenTLe 1,501]

20 minutes ago, deano19980 said:

Hi all,

   I bought a SCG rose gold Daytona with a 7750 movement at the beginning of November and it is already losing time, today it has lost 15 minutes in 5 hours. Can anyone help with somewhere i can get it looked at or what the issue may be.

Dean.

Can you point out the exact model on a TD website? Because there are 2 versions with 7750, one with slim version and fake minure/hour counter which is good. And the "old" one with a crappy movement which is prone to failure after some time due to the bad system they used to move the running seconds from 9 to 6 o'clock.

[deano19980 54]

Hi, thanks for your reply. The watch is a Rolex Rose Gold Daytona from the JH Factory

I hope this is what you meant in your message.

Dean.

[deju 1,869]

27 minutes ago, deano19980 said:

The watch is a Rolex Rose Gold Daytona from the JH Factory.

5 hours ago, GenTLe said:

And the "old" one with a crappy movement which is prone to failure after some time

Yup it’s a phat case A7750, they are nasty nasty movements. Only reason ARF slim version is ok is that they removed the chrono when sliming the a7750 main plate 

[deano19980 54]

Is there a fix (apart from buying a better movement) as I paid £330 4 weeks ago?

[Simonix 8,660]

If it’s just losing time, then the movement might just need regulating. 
 

basically “turn up the speed” a little. Normally done by adjusting a lever or small screw on top of the balance wheel. You need a Timegrapher in order to know if you’ve done it right though. 

[deano19980 54]

Appreciate your advice, thanks.  Is there anyone in or around Cheshire who could do this or knows someone who does?

[deju 1,869]

This is what needs done 

You can get free timegrapher apps for PC and android phone. If you know any musicians I tried it once attaching a violin mic to the watch and got a very good reading on the PC.

[tribefan 6,768]

In addition to our vendor forum here, there are some UK / EU guys here that might be able to help:

https://forum.replica-watch.info/forum/watchmakers-and-horologists

Lot of people won't work on chronos. Also, I would not assume the worst, could be something basic that a watch maker can fix and it will run long time.

There is a lot documented here on those movements, two core issues, one they are chronos put together in Chinese warehouses, think storage unit, and two, how they get modified to work for that watch. Not uncommon for people to have these serviced straight away new for preventative purposes.

[GenTLe 1,501]

11 hours ago, deju said:

Yup it’s a phat case A7750, they are nasty nasty movements. Only reason ARF slim version is ok is that they removed the chrono when sliming the a7750 main plate 

I agree with you about the bad A7750 on this one (as like all BPs, JH and old A7750 Noob ones). It's not correct the thing about the ARF: the removed crono parts aren't in exact relation with the fact that their 7750 is ok. They use the thin 7750 that was developed by ZF for the IWCs, which have the sec at 6 and minute at 12, and has a good transfer system for the sec at 6. The missing working parts at 9 and 3 are the direct result of the fact that the movement was modified with the IWC in mind, also making it possible to have a non sunken date (which there isn't on the Daytona, but it's there in the IWCs).

10 hours ago, deano19980 said:

Is there a fix (apart from buying a better movement) as I paid £330 4 weeks ago?

Not really... The fix would have been make some proper research before buying it :( And you can't also swap movement with a ARF one as the height of the stem will be different and the case hole will not align.

[GenTLe 1,501]

10 hours ago, Simonix said:

If it’s just losing time, then the movement might just need regulating. 

15 minutes in 5 hours? = 1:12 a day? I think that's out of range of regulation... Plus it will not solve the problem caused by too much drag on for the power of the movement.

[Simonix 8,660]

6 minutes ago, GenTLe said:

15 minutes in 5 hours? = 1:12 a day? I think that's out of range of regulation... Plus it will not solve the problem caused by too much drag on for the power of the movement.

Not sure about that actually. 
And it’s worth a try instead of binning a watch surely?!

[GenTLe 1,501]

11 minutes ago, Simonix said:

Not sure about that actually. 
And it’s worth a try instead of binning a watch surely?!

Yes, why not? I think it's just an agony prolongation but still...

[GingerApple 7,281]

To lose that much, would demagnetisation not be a starting point? Ever leave your watch near a magnetic source OP?

[Wires 4,751]

43 minutes ago, TheGingerFerret said:

To lose that much, would demagnetisation not be a starting point? Ever leave your watch near a magnetic source OP?

I have had 2 watches come through the post that we’re losing time massively over short periods of time. I bought a demagnetiser and both worked perfectly straight after. @deano19980 I’m in Warrington if you want to see if it does any good, they aren’t very expensive and are a good thing to have in

[deano19980 54]

That would be a great start and very kind of you @Wires. I'm in Stockport so not far from you. Are they readily available?

[deano19980 54]

Not been on here much since joining in 2016 and havnt been involved in forums before so apologies if I'm stating the obvious but I would just like to throw out there how humbling it is for me to see people using their free time to give their advice and very detailed knowledge about myself and other members issues and questions. Just saying!

[Wires 4,751]

33 minutes ago, deano19980 said:

That would be a great start and very kind of you @Wires. I'm in Stockport so not far from you. Are they readily available?

This is the one that I have, I’m sure you can find cheaper but I wanted it for the next Day

https://www.amazon.co.uk/Hanperal-Demagnetizer-Repair-Demagnetise-Mechanical/dp/B07JFHW23D/ref=sr_1_1_sspa?crid=3P22WWQK92AKL&dchild=1&keywords=demagnetizer&qid=1607006711&sprefix=Demag%2Caps%2C167&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExSzUxVlFFQk41MFpCJmVuY3J5cHRlZElkPUEwOTA3ODg4ODg2MjBBQ0hBUU1HJmVuY3J5cHRlZEFkSWQ9QTAyOTk3MTRBNjk0QVNBUEk0M08md2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

 

[deano19980 54]

I've ordered it for tomorrow @Wires, so I'll give it a go and see what happens. Next step if this doesn't work is to find a watch repairer who won't hit it with a hammer when asked to look at it.

[GenTLe 1,501]

6 hours ago, TheGingerFerret said:

To lose that much, would demagnetisation not be a starting point? Ever leave your watch near a magnetic source OP?

A magnetized hairspring gains time, not the opposite

[deju 1,869]

6 minutes ago, GenTLe said:

A magnetized hairspring gains time, not the opposite

My thoughts exactly  fucking noobs eh

[deano19980 54]

Now I am confused (not that it takes much). I'll give it a try and see. Like I said Next step, watch repairer.... 

[deano19980 54]

How does this work then?

5 hours ago, Wires said:

I have had 2 watches come through the post that we’re losing time massively over short periods of time. I bought a demagnetiser and both worked perfectly straight after. @deano19980 I’m in Warrington if you want to see if it does any good, they aren’t very expensive and are a good thing to have in

@deano19980 

•  

Edited December 3, 2020 by deano19980

[GingerApple 7,281]

Fucking noobs.

(Disclaimer - Gentle has forgotten more about watches than I'll ever learn so I'd be inclined to listen to him rather than me. Definitely don't listen to Deju, he's stupid).

[Wires 4,751]

There isn’t only the hairspring to magnetise though

What effects does magnetism have on your watch?

Most watch movements are made up of tiny steel components. More often than not, magnetism will cause a watch to gain time, but it can also cause it to lose time or potentially stop. A medium to strong charge will pull these pieces in different directions, potentially slowing down cogs or bringing them to a halt.