How to open Vintage omega seamaster unishell case

Richardadelberg · Mar 9, 2018

I have a caliber 570. One piece case. Need to adjust rate as runnin-30 seconds a day. I have crystal just removing tool, press with a dozen plastic disks top and bottom. Watched video on crown removal, bezel, crystal removal. Should be able to turn ring to release from case. So how does one press the crystal and bezel back in place? Any secrets. Should I use a press or crystal remover in opposite action that I removed it. Tired or sending to watchmaker as several times they have come back with second hand having fallen off in shipping...

Kwijibo · Mar 9, 2018

the lesson is, never buy cheap tools. the claw works fine on my seamasters, Why don't you find it fine?

Deafboy · Oct 28, 2018

Reviving the thread!
I have a few question about tool 107.

1) It is used to remove the crystal but can it also be used to replace it (as mentioned on this site : "Replacing the crystal is exactly the reversal of the above procedure.")?
2) My watch is a Seamaster 14765-3SC. Is the 107 the correct tool for this watch?
3) Does one remove the bezel before removing the crystal?

JimInOz · Oct 29, 2018

Tool 107 is only used to remove/replace the crystal. Your watch should have a "Tool 107" indication somewhere if it's needed.

Note that there are two types of Omega "monobloc" cases.

1. - The "Unicoc", where the removal of the crystal is done with a crystal lift (e.g. Tool 107) and then the movement can be accessed.

2. - The "Monocoque", where the movement is accessed by removing the bezel/crystal assembly with a case knife.

Archer · Oct 29, 2018

Deafboy
1) It is used to remove the crystal but can it also be used to replace it (as mentioned on this site : "Replacing the crystal is exactly the reversal of the above procedure.")?

No - use a press.

Deafboy
2) My watch is a Seamaster 14765-3SC. Is the 107 the correct tool for this watch?

Not if the watch has a bezel.

Deafboy
3) Does one remove the bezel before removing the crystal?

They often come off together, but generally yes.

Deafboy · Oct 29, 2018

Thanks for the information. I much better understand now. There no reference to a tool on the case and there is a bezel; so then it is a monocoque design as Jim described.

I bought the watch yesterday at an auction.

How to open Vintage omega seamaster unishell case

Richardadelberg

Kwijibo

Deafboy

JimInOz

Archer

Deafboy

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