Seiko 7s26A

[TheFixer]

Hi everyone,

Does anyone know if the mainspring barrel complete for a 7s26 will fit a 7s26a ? I am about to service a 7s26a.

7s26 barrels are available from Cousins.

 

Thank you.

 

Jon

[jdm]

7S26 has A, B, and C versions but not "plain 7S26". The barrel complete was changed in the B version as noted in my sheet https://docs.google.com/spreadsheets/d/1sYt_mI9c4tAPiKN3IM8lQx3NEEOyz2DMjVHx5I1_Mqw/edit?usp=sharing

Before buying be very sure that the barrel complete really need replacing. You could be spending almost the same as for a brand new and better mov't for no good reason.

 

 

Edited October 12, 2019 by jdm

[TheFixer]

2 minutes ago, jdm said:

7S26 has A, B, and C versions but not "plain 7S26". The barrel complete was changed in the B version as noted in my sheet https://docs.google.com/spreadsheets/d/1sYt_mI9c4tAPiKN3IM8lQx3NEEOyz2DMjVHx5I1_Mqw/edit?usp=sharing

Before buying be very sure that the barrel complete really need replacing. You could be spending almost the same as for a brand new and better mov't for no good reason.

 

 

Thank you.

Cousins has a 7s26 listed but not a 7s26a.

I am a big fan of the A movement as it is the best variant.

[jdm]

6 minutes ago, TheFixer said:

Cousins has a 7s26 listed but not a 7s26a.

Look at the P/N and verify on my sheet above. That will tell you to which version it belongs.

[TheFixer]

23 minutes ago, jdm said:

Look at the P/N and verify on my sheet above. That will tell you to which version it belongs.

Will do.

[TheFixer]

I have found an alternative spring which is cousins part no: GR2378X

0.95X.12 X400 X10.5

Ever so slightly thicker but the nearest I could find.

However I will clean the original and see how it performs.

Many thanks to jdm

 

[aac58]

7S26A uses the same barrel than 7005A (PN 201 024). I think the GR spring should be ARA1S04696 - GR2377-X (0.95  0.11 400 10.0)

Edited October 12, 2019 by aac58

[jdm]

9 minutes ago, TheFixer said:

I have found an alternative spring which is cousins part no: GR2378X

0.95X.12 X400 X10.5

Ever so slightly thicker but the nearest I could find.

Check thread below about adaptability of generic mainsprings to a Seiko barrel. 

In general the best approach is to leave the sealed barrel alone. While you may think that it is the mainspring to cause a Seiko watch to run poorly, that is rarely the case. 

 

[TheFixer]

28 minutes ago, jdm said:

Check thread below about adaptability of generic mainsprings to a Seiko barrel. 

In general the best approach is to leave the sealed barrel alone. While you may think that it is the mainspring to cause a Seiko watch to run poorly, that is rarely the case. 

 

Thanks for that but the other mainspring mentioned is no longer available.