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Seiko 7009A Mainsping Winder Size


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Hi all

I am trying to repair a Seiko 7009A movement, what is the correct size Mainspring winder needed for this size watch movement.

I have one of the Chinese Winding kits bot nothing fits this spring, so was going to get the proper size Bergeon winder as I have quite a few of this movement to work on in the coming months.

Thanks for any input on this

Paul

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Thanks for the quick reply, will keep an eye out for a Number 6

On a good note and down to luck more than anything else I managed to get the Chinese 8200 one to wind the spring and successfully load it into the barrel, more luck than judgment I am sure, but at least its all back together and working.

Paul

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Try to mix and match the winders with the winder insert. I had some success with this for the Chinese winders with 7009 mainsprings.  I finally gave up (as the Chinesium ones started wearing) and bought bergeon ones. The bergeon ones are quite a bit better for seiko. If you can get a new mainspring I would go that way.

Matt

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  • 1 year later...
On 8/4/2021 at 11:51 AM, Paul80 said:

Thanks for the quick reply, will keep an eye out for a Number 6

On a good note and down to luck more than anything else I managed to get the Chinese 8200 one to wind the spring and successfully load it into the barrel, more luck than judgment I am sure, but at least its all back together and working.

Paul

Hey out of curiosity did you ever pick up a number 6 or bergeon winders for this caliber? 
I'm about to order my first sizes for mainspring winders and i'm having trouble figuring out for sure whether the same combo of bergeon winder/barrel works for 7s26 and 700X.

These things are expensive so i want to make sure i get what i need and i'm just finding a lot of conflicting information.

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