Seiko Sumo bezel removal. Need help ! - Seiko & Citizen Watch Forum – Japanese Watch Reviews, Discussion & Trading
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Old 02-21-2016, 11:29 AM   #1 (permalink)
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Default Seiko Sumo bezel removal. Need help !

I have one of the new Prospex dial Sumos and I wanted to replace the crystal with a domed sapphire.

I got everything I need (or so I thought), the crystal from Crystal-times, a couple of extra crystal gaskets (genuine Seiko 8659 2930) and some nylon dies to use on my drill press (to be used just as a manual press).

But I'm unable to accomplish the very first step: I can't, for the life of me, remove the bezel.

I know that there are a couple of notches on the bezel edge when the triangle is at 15' or 45'. I can see them. but with neither with a case opener knife nor the blade of a swiss army knife I could get in and pry the bezel off.

I even made a bezel remover that tries to insert two purpose made blades at both sides at the same time. Nothing. I can't get in, and the bezel remains firmly put in place.

From what I read, once the two notches are located, with pretty much any knife, the bezel was quite easy to remove. So, what am I doing wrong ?

Any help will be greatly appreciated.
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Old 02-21-2016, 11:44 AM   #2 (permalink)
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I generally use a Stanley type blade, which is both thin and strong. This type of thing
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Old 02-21-2016, 11:57 AM   #3 (permalink)
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The problem with the Sumo is that the bezel edge is only accessible between the lugs, and with the semi-shrouded design, the lugs stand very tall at both sides.

Any long blade is bound to touch the lugs' tops and dent the finish...

Ask me how I know this...
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Old 02-21-2016, 12:20 PM   #4 (permalink)
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Try a guitar pick, or a disused credit card with the edge filed sharp.

I try to start with "harmless" tools, then "escalate" to more dangerous tools only if necessary.
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Old 02-21-2016, 04:01 PM   #5 (permalink)
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Don't forget - be careful
Use a cloth or wear gloves- or.....

While removing a citizen bezel - I didn't beat me
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Old 02-21-2016, 04:33 PM   #6 (permalink)
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Quote:
Originally Posted by lewie View Post
Don't forget - be careful
Use a cloth or wear gloves- or.....

While removing a citizen bezel - I didn't beat me
Looks like it bit you though! Ouch!
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Old 02-25-2016, 04:09 PM   #7 (permalink)
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Yowza
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Old 03-04-2016, 09:49 AM   #8 (permalink)
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I removed a Sumo bezel a couple of weeks ago and it was the hardest by a long long way of any bezel i've removed, tight isent the word for it and it was pretty stiff to replace as well.
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Old 03-07-2016, 12:25 AM   #9 (permalink)
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Quote:
Originally Posted by TheTigerUK View Post
I removed a Sumo bezel a couple of weeks ago and it was the hardest by a long long way of any bezel i've removed, tight isent the word for it and it was pretty stiff to replace as well.
Wow ! That's so reassuring to read ! Most replies I got (here and in WUS) make it look so easy that I thought it was just me doing something wrong.

I have given up for the time being because I was already risking doing some damage to the case edges below the bezel.

Any tricks or suggestions on how to do it properly?

All help will be greatly appreciated.
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Old 03-10-2016, 06:16 AM   #10 (permalink)
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Just a brief update.

No, I have not succeded in removing the bezel. As a matter of fact I gave up after the last attempts almost leave some damage marks to the case.

But, the initial goal was to replace the crystal, and the good news is that there is NO NEED to remove the bezel for that on the Sumo ! The Sumo uses a pressure fit nylon gasket, and there’s no crystal retainer ring to be removed.

After some very useful interaction with TheTigerUK (Thanks John !) we determined that the stock crystal could be safely pushed out from the back, and the new crystal pushed in from the top, all with the bezel still in place. Last evening I performed the surgery, I also replaced the gasket with a new one, and the watch successfully passes the 6-bar WR test after the exchange.

Now, what a difference the sapphire crystal makes ! The improvement in clarity is significant, the dial and hands really gain in depth. And the looks of the high dome suit the outspoken personality of the Sumo really well.

I am very happy with the upgrade. In case anyone is interested, I got the crystal from Crystaltimes (ebay), and the gaskets directly from CousinkUK (Seiko 8659-2930).

And a picture to celebrate:
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Old 04-19-2016, 03:07 AM   #11 (permalink)
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That is a lovely result. Once I get over my SUN shroud trauma I might give this a try myself.

Just being nosy here, what crystal press are you using? I did a bit of a bodge job on a Swiss Army to replace a broken crystal with a g-clamp and sockets. I need to get the proper tools soon.
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Old 05-15-2016, 01:49 PM   #12 (permalink)
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This looks very nice on the Blumo !! Cool result !!
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