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Posted

Destroyed three hairsprings trying to repair my Seiko 4206.  Rather than proceeding with the repair I looked at a new movement. The Seiko (TMI) NH06 appears to be similar in size. I checked he dial and the day-date window and diameter are the same. 

Has anyone made this swap or is there a different movement I should be looking for.

Thanks for your comments, Dave

Posted

Which version of the 4206 are you working with and what's the problem you're having with the spring?

It would be much better to either repair or replace with another 4206.

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