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Post by sturmgewehr1944 on Dec 15, 2021 17:20:20 GMT -8
Guys ,
New to the site and I just picked up a nice 7548 but it needs a new Crystal and I want to replace all the Gaskets / Seals. I have always been an original parts guy but with the age of this watch not sure if Seiko still has this stuff ? Or is there a quality aftermarket company that can help ??
thanks in advance
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trilo
WS Benefactor
Posts: 1,995
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Post by trilo on Dec 16, 2021 0:21:44 GMT -8
Send a photo of the case back or list all the numbers on it. With that information people will able to show you the right direction.
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Post by sturmgewehr1944 on Dec 16, 2021 7:49:57 GMT -8
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Post by bklake on Dec 16, 2021 9:01:01 GMT -8
Don't be too quick changing the crystal gasket. In my limited experience of 10 or so, I haven't found an original one that was bad. I don't know what the material is but it is good. The one aftermarket crystal gasket I have does not impress me.
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Fergus
Needs a Life!
Posts: 2,943
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Post by Fergus on Dec 16, 2021 9:28:44 GMT -8
Bezel Gasket: Cousins Part 903650C O ring seal. 36.5mm inside diameter, 0.9mm cross section diameter.
Case Back gasket: Cousins Part 903060C O ring seal. 30.6mm inside diameter, 0.9mm cross section diameter.
Crown gasket: dave-e-b on ebay.
Crystal: Klein Vintage Watch - 320W34GA00
Crystal gasket: I concur that the crystal L gasket, if removed with care, should still be OK as they are manufactured from a polyethylene type material. Bry (ebay handle tog_man) in the UK offers an A/M version which seems good (I have used one). He also has crystals but having dealt recently with him he's out of stock at the moment.
Adrian (VTA) also offers gaskets.
The gaskets for 7548 diver's is identical to 6306/6309 diver's.
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HiBeat
Global Moderator
SEIKO Iko Iko GDTRWS
Posts: 8,663 
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Post by HiBeat on Dec 16, 2021 18:15:33 GMT -8
Not sure what country you are in, you can try Klein in the USA for sure, also Crystaltimes makes a nice sapphire version CT041.
In the UK seller Bryan has a great one he is not on this forum but he is on ebay and I have used several of his and recommend them too.
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Post by sturmgewehr1944 on Dec 17, 2021 9:48:13 GMT -8
I'm in the USA .... here is what mine looks like...
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28A
WIS
Ruining original Seikos since 2015.
Posts: 1,021
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Post by 28A on Dec 18, 2021 2:09:32 GMT -8
Any crystal for a 6309 diver or a 6105 will fit as well. One of my 6309 cased 7548's has a massive bubble dome crystal in it from Spencer Klein. I also have another 7548 watch with a 6105 crystal in it.
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Post by sturmgewehr1944 on Dec 22, 2021 18:40:13 GMT -8
Thanks guys !! Just got Crystal from Spencer and found some seals on Ebay that are supposed to be Seiko seals? Will post back once I get it done…
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Post by martyloveswatches on Apr 4, 2022 8:20:13 GMT -8
Bezel Gasket: Cousins Part 903650C O ring seal. 36.5mm inside diameter, 0.9mm cross section diameter. Case Back gasket: Cousins Part 903060C O ring seal. 30.6mm inside diameter, 0.9mm cross section diameter. Crown gasket: dave-e-b on ebay. Crystal: Klein Vintage Watch - 320W34GA00 Crystal gasket: I concur that the crystal L gasket, if removed with care, should still be OK as they are manufactured from a polyethylene type material. Bry (ebay handle tog_man) in the UK offers an A/M version which seems good (I have used one). He also has crystals but having dealt recently with him he's out of stock at the moment. Adrian (VTA) also offers gaskets. The gaskets for 7548 diver's is identical to 6306/6309 diver's. This was helpful for me also. Thank you. Any recommendation for the crown? Where to find one...? |
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Fergus
Needs a Life!
Posts: 2,943
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Post by Fergus on Apr 4, 2022 11:03:17 GMT -8
Crown gaskets (O rings) The case tube is 2.55 mm OD. The O ring gaskets I have fitted and conform measure 2.3 mm ID x 0.95/1.0 mm csd. www.polymax.co.uk list O rings Nitrile 70 ShA, 2.35 mm ID x 1 mm csd EPDM (rubber) 70 ShA, 2.31 mm ID x 1 mm csd Best look at their web for price/quantity breaks. |
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Post by martyloveswatches on Apr 4, 2022 13:08:39 GMT -8
Best look at their web for price/quantity breaks. What is the web site? Tnx |
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Post by nzwatchdoctor on Apr 21, 2022 13:52:16 GMT -8
Any crystal for a 6309 diver or a 6105 will fit as well. One of my 6309 cased 7548's has a massive bubble dome crystal in it from Spencer Klein. I also have another 7548 watch with a 6105 crystal in it. Agree - any quality glass with the right part number / for this watch from an ebay seller will do. Quality generic back seals are fine. I've bought new glass seals but they never fit as well as the original seals so I've always reused the originals. They're fine when water pressure tested. |
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