Got a bag of movements today...

Got a bag of movements today...

Joined: June 19th, 2009, 6:51 pm

October 15th, 2011, 3:46 am #1

These came in the mail today from Ramon...


Three of them are running after winding them up!
Most of the others can be revived and there is one special movement in the group.

The one at the bottom left of the picture is a Leopard(7230) movement sporting 28 jewels and a beat rate of 36000bph.

I hope to get this one running and transplant it into an NY2300 case. It may take some fidgeting to make it fit but I think it might be doable

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Joined: October 25th, 2005, 9:59 pm

October 15th, 2011, 8:49 am #2

nt
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Joined: August 15th, 2007, 11:07 am

October 15th, 2011, 3:37 pm #3

These came in the mail today from Ramon...


Three of them are running after winding them up!
Most of the others can be revived and there is one special movement in the group.

The one at the bottom left of the picture is a Leopard(7230) movement sporting 28 jewels and a beat rate of 36000bph.

I hope to get this one running and transplant it into an NY2300 case. It may take some fidgeting to make it fit but I think it might be doable

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Then again i am also sure if it does not fit you will Make it!!!LoL.

Theneilo uk

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Joined: June 19th, 2009, 6:51 pm

October 15th, 2011, 3:44 pm #4

nt
There is one 7290 and the rest are 6000 and 6500 series. Some are 21 jewel autos and some are 17 jewel models.
All are hand windable and a few, like the Leopard are hacking as well!

Generally speaking; these 6xxx movements are much better built and finished than the 8200 series.
I guess Miyota did the same thing as Seiko when it cost reduced the 6xxx series into the 7xxx series and finally the 7s26.

One of these movements is an HMT(India) and it looks very siilar to the Miyota 6501. HMT also used the Miyota 0201 hand wind caliber.
I believe they made these under license to Miyota.

When I'm done; 7 or maybe 8 of these movements will be back in proper working order

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Joined: June 19th, 2009, 6:51 pm

October 15th, 2011, 3:56 pm #5

Then again i am also sure if it does not fit you will Make it!!!LoL.

Theneilo uk

will be enough. The standard 8200 is a 25.6mm x 5.67mm while the 7230 is 28.8mm.

There is always a dremel tool

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Joined: March 5th, 2009, 3:41 am

October 15th, 2011, 5:22 pm #6



MikeyT
In the Thumb of Michigan
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Joined: June 19th, 2009, 6:51 pm

October 15th, 2011, 6:11 pm #7

it isn't going to remove the case threading for the case back.

But that will have to wait it's turn; first the rebuild

Anyway, I now have lots of hands to practice lume work

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Joined: June 19th, 2009, 6:51 pm

October 15th, 2011, 9:56 pm #8

will be enough. The standard 8200 is a 25.6mm x 5.67mm while the 7230 is 28.8mm.

There is always a dremel tool

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With the movement spacer removed, the Leopard movement is a perfect fit in the NY2300 case. Even the stem lines up perfectly

When I put the movement into the case and turned it over I noticed it was running right along but when I turned it back over it stopped.
This may indicate a problem with the balance staff...bummer

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Joined: August 8th, 2007, 10:15 pm

October 16th, 2011, 1:22 pm #9

Regarding the watch running dial down but not dial up, it could be many things, but a broken staff is one of them. Check the end shake on the balance and make sure that the balance spring is not contacting anything in the different positions.

I'm assuming you are servicing theses, and if so make sure you check the 36,000 bph watch for wear, as they often have significant wear due to the heavier mainsprings needed for the fast beat rate.

Good luck.

Cheers, Al
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Joined: June 19th, 2009, 6:51 pm

October 16th, 2011, 3:31 pm #10

I'm planning on servicing as many of them as seem likely candidates for restoration.
The Leopard will get extra close scrutiny as I know these high beat engines are under a lot more stress than the lower beat varieties.

I haven't disassembled it yet but I fully expect to find the pinion on one end of the balance staff badly worn or worn off. If that's the case, it's fairly unlikely that I'll find another donor that is in good condition

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