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Discussion Starter #1
After 11 years (5 years indicated battery life!) of solid service....my trusty dive companion needed a new battery.

Tuna_10 by etienne spiteri, on Flickr

Tuna_6 by etienne spiteri, on Flickr

Tuna_4 by etienne spiteri, on Flickr

Tuna_1 by etienne spiteri, on Flickr


Fresh battery, new gaskets, pressure test and some TLC. It is now rearing (as am I!) for many more underwater adventures :).

To me, there is no better Professional dive watch. Now I just need to source some OEM Seiko parts. Can you provide reliable source? I used up the OEM new ones I had. I also stripped the head of the allen bolts. I need:

Caseback gasket
Crystal (L-Shape) Gasket
Bezel Gasket
Crown O-ring
Shroud screws x 3 qty. (allen head)

Thanks in advance :)
 

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beautiful watch !
 

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Caseback gasket - 0C3060B0A
Crystal (L-Shape) Gasket - EZ3210B04
Bezel Gasket - 0C3660B02
Crown O-ring - NO LISTING. If i have to guess it's 0k024b0a
Shroud screws x 3 qty. (allen head) - 81507109
 

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You shouldn't need to replace the crystal L-shape gasket unless it was installed incorrectly previously, If your crystal has never been replaced, I'd leave it alone and pressure test once your crown/caseback seals are replaced and you should be a-ok.

300M case Tuna gasket part #'s I've used previously below -
I believe they're all interchangeable, you should be able to buy these from
ST Supply (USA) or you can get complete sets on ebay for around $18 USD from Adrian - Vintage Time Australia

crown 0K0240B0A
caseback 0C3060B0A
bezel 0C3660B02
 

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Discussion Starter #6
Thanks All. I would like to replace the L-Shaped crystal gasket as I had previously installed a Dagaz A/R Coated Sapphire Crystal. Will check these sources. Thanks!
 
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