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Advice Need On A7750 Chrono Fix

Lolo1972sg

By Lolo1972sg
in Watch Repairs Help & Advice

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Lolo1972sg New Member

Lolo1972sg

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Hi folks

I have a cheapie rolex homage with chrono functions. The movement inside is probably an a7750 (opened once a few years ago and can't remember exactly).

Recently, I tested the chrono function and the chrono started but would not stop, ie, when I press down on the stop chrono button, no click sound is heard and it does nothing to stop the chronometer. Same thing when I tried on the reset chrono button, no click sound neither.

Can anyone kindly advise what can be done by myself (a newbie) or any quick fix please.

Thanks a lot. :)

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Lolo1972sg New Member

Lolo1972sg

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Hi folks

I have a cheapie rolex homage with chrono functions. The movement inside is probably an a7750 (opened once a few years ago and can't remember exactly).

Recently, I tested the chrono function and the chrono started but would not stop, ie, when I press down on the stop chrono button, no click sound is heard and it does nothing to stop the chronometer. Same thing when I tried on the reset chrono button, no click sound neither.

Can anyone kindly advise what can be done by myself (a newbie) or any quick fix please.

Thanks a lot. :)

Any advice please?

Thanks

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Lolo1972sg New Member

Lolo1972sg

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Its probably a Chinese copy of a 7750, terrible movement but good to learn on.

Yes. Very highly likely an Asian clone of 7750.

I am thinking of opening it up and check the chrono button. If anyone has any advice on what to look out for, it would help and I would be much appreciative please.

Thanks in advance

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Lolo1972sg New Member

Lolo1972sg

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Do not assume all Asian movements are bad movements.

Check this blog about (some) A7750 having protection for adjusting date at any time, which ETA doesn't have.

http://watchguy.co.uk/valjoux-7750-terminal-date-change-feature/

Hmmm... Interesting and I did not know about that.

Anyhow, how about anything on the chrono issue I have please? Any help?

Thanks

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jdm Distinguished Member

jdm

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Anyhow, how about anything on the chrono issue I have please? Any help?

One can't know without looking. To set expectation rights, chrono is all about levers and springs and is considered advanced watchmaking, plus spare parts for Asians movements are practically impossible to get. Of course you could be lucky and able to sort it out easily.

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