Seiko 5 7009-8210

[benemos]

Hi,

This is my first real experience with watch restoration. I've tinkered with movements previously and recently serviced an ETA 2824-2 in my Glycine but that's it. Please excuse any incorrect terminology I use, very new to this and just starting with my horology education. I bought a cheap but working Seiko 5 railway time with a view to dismantling, restoring (to a reasonable level) and servicing it. I'd like to be able to use it by the time i'm done.

It's pretty crusty with seals missing or worn, dusty old lume and doesn't run great but it has at least had some love over the years. Some pictures for the 'journey' so far;

 

 

 

 

The strip down went fine except for the Second reduction wheel screw which sheared when I tried to remove it. Luckily I managed to remove the thread without causing damage and have a replacement standing by. Please ignore the hair, was used for scale - I was showing off to family as I was so chuffed to remove such a small threaded shaft.

 

 

It's currently in bits awaiting a good clean whilst I turn my attention to the crystal and case.

 

#

 

That leads me on to my first question. I couldn't locate a crystal gasket either residing in the case or stuck to the crystal. I'm sure it must have had one in an attempt to be water resistent. The gold coloured tensioning ring is present however. Does anyone know what type of gasket I require to properly seat/seal the crystal? Looking at Cousins in the UK I see the 'I' or 'L' types but i'm unsure and also of the correct way to size the gasket. Any help would be appreciated. Some images below of sizing.

 

I'll update further as I progress.

Thanks, Ben.

[jdm]

1 hour ago, benemos said:

That leads me on to my first question. I couldn't locate a crystal gasket either residing in the case or stuck to the crystal. I'm sure it must have had one in an attempt to be water resistent. The gold coloured tensioning ring is present however. Does anyone know what type of gasket I require to properly seat/seal the crystal? Looking at Cousins in the UK I see the 'I' or 'L' types but i'm unsure and also of the correct way to size the gasket. Any help would be appreciated. Some images below of sizing.

It there is a tension ring there won't be a gasket. Water resistance will be based on surfaces (tight) contact and owner's responsibility.

Edited July 31, 2019 by jdm

[benemos]

9 hours ago, jdm said:

It there is a tension ring there won't be a gasket. Water resistance will be based on surfaces (tight) contact and owner's responsibility.

That's great, thanks for the info.

[anilv]

The reduction wheel screw is a left-hand thread. Basically anything with three lines on it is left-hand threaded.

Just in case you were not aware!

Anilv

[benemos]

19 hours ago, anilv said:

The reduction wheel screw is a left-hand thread. Basically anything with three lines on it is left-hand threaded.

Just in case you were not aware!

Anilv

Indeed. I remembered this time but I suppose it's easily overlooked. I think I'll keep a few of those screws spare in future!