Seiko 7S26-02F0...

[sjhilbel]

I should have know this could happen, but I went into the project with blinders.

I was almost finished putting together my Seiko 7S26-02F0. I could see it on my wrist within minutes. Then I found out how plastic parts hold up over time. I picked up the Day Date Corrector Wheel and notice one of the teeth was not level with the rest. I bring it in for a closer look... a crack from top to bottom. And as I'm looking at it, the tooth falls off completely. I picked up the tooth and it crumbled in my fingers. I found the same thing happening with the other plastic parts within the watch. Is this common for Seiko parts? I got is from someone who only got it serviced as a Seiko shop, so this kind of baffles me.

[jdm]

Not common, maybe it took extreme heat, or was  faulty batch. You should be happy as you're working on mov't that cost new $25 in an improved version that hacks and manually winds, everything is easy to get, imagine if it was 100 times as much and virtually impossible to find.

[watchweasol]

Hi Definitly not common but I have had it happen where teeth have broken, although I have had it happen with quartz clock movements where the plastic wheels crumble, probably old age and drying out.

[sjhilbel]

9 minutes ago, jdm said:

Not common, maybe it took extreme heat, or was  faulty batch.

That is good to know. And yes, I am thankful that I need a $5 part rather than a $100 one. One of the reasons I started on a Seiko.