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what are the usual markings to check when confirming if a 7s26 movt is authentic? nt.

April 4 2009 at 8:11 AM
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  (Login big-e-294)
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.

You can pick your friends. You can pick your nose... But you can't pick your friend's nose!!


    
This message has been edited by big-e-294 from IP address 202.156.13.228 on Apr 4, 2009 8:13 AM


 
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(Login Raven_Loon)
70.70.214.217

The usual markings are...

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April 4 2009, 8:17 AM 

- 7s26A or 7s26B on the rotor
- Seiko stamped on the main plate near the balance
- the shape of the balance jewel shock system

But there are legitimate movements out there without one or the other of the markings.

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[linked image]

 
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(Login big-e-294)
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so its normal that there is no Seiko stamped on the main plate?

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April 4 2009, 8:22 AM 

coz' mine doesn't have it.

i will check the shape of the balance jewel shock system.

Thanks!

Ben

You can pick your friends. You can pick your nose... But you can't pick your friend's nose!!

 
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(Login d503579)
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what does the shock system look like?? nt

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April 4 2009, 8:53 AM 


 
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(Login Raven_Loon)
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This is the Daishock system found in Seiko watches...

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April 4 2009, 9:33 AM 

[linked image]
Note: This one doesn't have the 'SEIKO' stamped on the plate just below and to the left of the bottom red arrow.

The Chinese fake 7s26 looks like this...
[linked image]

This is often one of the first and easiest signs of a fake.

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[linked image]

 
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5Seikos
(Login 5seikos)
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I dont see anything necessarily telling the bottom picture is a fake

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April 4 2009, 9:54 AM 

can you elaborate why you think the bottom one is a fake?
1. the shock protection used is ok.
2. the shape of the plate seem to be ok.
2. on the older 7000 series autos, the only Seiko name is on the top plate. main plate has only a few numbers between the top plate and the balance.on your picture it's hard to tell if there are markings below the rotor.

Rob T

 
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(Login Raven_Loon)
70.70.214.217

Because...

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April 4 2009, 10:57 AM 

I got the bottom picture from here...
http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&China_7S26

The Diashock system on the 7s26 doesn't have the 3 lobed spring.

The shape of the plate when disassembled can be seen to be different.

We are discussing the 7s26 and I have examples with and without the 'SEIKO' stamp on the main plate.

If you look closer at the two pictures, you can also see that the balance bridges are not exactly the same in shape either.

Lew B. has also hi-lighted more of the physical differences besides markings.

These fakes are not actually very faithful copies as most of the parts won't interchange.

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[linked image]

 
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alfredo
(Login seiko6109)
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jewel on balance cock looks different nt

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April 4 2009, 10:29 AM 


 
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(Login Raven_Loon)
70.70.214.217

I don't know if the actual jewels are different but...

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April 4 2009, 10:58 AM 

the little brass retaining clip is different in shape and construction as is the recess where it sits and holds the jewels in place.

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[linked image]


    
This message has been edited by Raven_Loon from IP address 70.70.214.217 on Apr 4, 2009 10:58 AM


 
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(Login seiko6109)
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yeh that's

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April 4 2009, 11:28 AM 

the bit I meant, but I've no idea what it's called

 
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(Login Raven_Loon)
70.70.214.217

In the Seiko parts list it's called 'Diafix spring' :>) nt

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April 4 2009, 11:54 AM 



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[linked image]

 
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(Login seiko6109)
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sounds like a contraception device nt

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April 4 2009, 12:02 PM 


 
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(Login Raven_Loon)
70.70.214.217

Maybe it's there to help 'end shake' ;>) nt

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April 4 2009, 1:29 PM 



-------------------------------------------
[linked image]

 
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(Login pcpilot2)
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As luck would have I have one here to show..PIX

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April 4 2009, 10:44 AM 

I just happen to have a "Fako" movement here on my bench so I thought I'd point out some of the differences to help identify them. Even though the Seiko 7s26 is a stamped out movement it's still far superior to the fako's cheapness as the following will show!

Real Seiko rotor...Font is tight & straight
DSC06998.jpg
Fako Rotor..Font is spaced & almost italic
DSC06995a.jpg
Note that Fako pallet bridge has only 1 screw and is very large..
DSC06995.jpg
Note the Real Seiko pallet bridge has 2 screws and is smaller (some even say "seiko")
DSC07007.jpg
Note that the Real Seiko has machined reduction gears..
DSC06992.jpg
The Fako is cheap stamped metal...
DSC06991.jpg

One other thing I noticed about this Fako..Look at the crazy washer like thing that hold the dial
peg!
DSC06991a.jpg
I hope this helps out??





I make Watches...From the Dead

[linked image]

 
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(Login Axel66)
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Very valuable post, thanks Lew! /nt

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April 4 2009, 10:55 AM 

..

 
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(Login RatBob44)
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66.84.99.211

Thank you very much

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April 4 2009, 2:56 PM 

for those photos. You helped this n00b verify that my SNK809K2 has an authentic movement, even though I wasn't overly suspicious of it.

 
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