Jump to content

Movement identification


Recommended Posts

Hello,

I would need your help identifying this watch caliber.

I have found this caliber in a Seiko 5 watch, which was surely franken (made from different pieces). The dial is 7s26, while the caseback has 7009 engraved on it...

 

The writing on the rotor is 7009A, but other parts don't look the same as 7009 to me:

- The bridge, which keeps the pallet fork in place has only one screw (7009 should have 2 screws)

- There are banking pins present (7009 doesn't have them)

- The day wheel was not working - it seems that the cover under the day wheel is different that in 7009. The hole in the middle of the cover should be bigger, to "accommodate" the day wheel

 

Thanks

Andrej

 

seiko_0.jpg

Seiko_1.jpg

seiko_2.jpg

seiko_3.jpg

seiko_3_5.jpg

seiko_4.jpg

Link to comment
Share on other sites

Thanks for the answers.

I don't know it's origin, I have bought the watch in Europe, as a non working (problems with day change) second hand watch... My idea was to study the assembling / disassembling of the watch caliber.

But I was hoping to get a 7s26, as this is written on the dial.

Anyway, if it is a copy, there is no other info.

If it is a Seiko standard caliber, I would like to know the reference number...

Thanks

Andrej

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I'm assuming that every time you set the watch you are work hardening the detent spring, maximum hardening is  where it meets the plate due to maximum deflection.   That's why it snaps there.  The Young's modulus may be the same but after it's reached its maximum yeid strength it breaks.  My mechanic engineering is very rusty, correct me if I'm wrong. 
    • Ah ok yes that makes sense to polish it where the arm starts to form from the body of the bridge, i thought you meant the underneath of all the arm.
    • this is something I've never quite understood about the some of the Swiss companies. In 1957 Omega was using 9010 for the keyless parts with epilam. there's been a slow migration towards using heavier lubrication's but still typically oils and epilam to keep them in place. When it seems like 9504 works so much better.  
    • OK, welcome in the world of alarm clocks... I guess the 4th wheel is dished because it is from another movement. If it was not dishet, then it would not mesh with the pinion of the escape wheel, am I right? The marks of wear on the 4th wheel pinion doesn't corespond to the 3th wheel table position, at list this is what i see on the picts. Calculating the rate is easy - there is a formula - BR = T2 x T3 x T4 x T5 x 2 /(P3 x P4 x P5) where T2 - T5 are the counts of the teeth of the wheels tables, and P3 - P5 are the counts of the pinion leaves. Vibrating the balance is easy - grasp for the hairspring where it should stay in the regulator with tweasers, let the balance hang on the hairspring while the downside staff tip rests on glass surface. Then make the balance oscillate and use timer to measure the time for let say 50 oscillations, or count the oscillations for let say 30 seconds. You must do the free oscillations test to check the balance staff tips and the cone cup bearings for wear. This kind of staffs wear and need resharpening to restore the normal function of the balance.
    • Glue a nut to the barrel lid, insert a bolt, pull, disolve the glue.  Maybe someone will have a better answer. 
×
×
  • Create New...