Seamaster Chrono 145.006 cases

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Caselock

·Jan 26, 2024

Hi all,

a quick question to the Seamaster-Chrono experts:

I wondered wether the Seamaster Chrono 145.006 cases for the cal 321 are exactly the same as for the cal 861. Or: is it possible to swap a 321 into a 861 and viceversa?

Best,

caselock

 

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duffy7

·Jan 26, 2024

The cal 861 and the 321 do have the same diameter (27mm). The 321 is slightly thinner 6,74mm (861 = 6,87mm) which shouldn't be a problem.

As far as I know the case of the 145.006 (cal 321) and the 145.016 (cal 861) is completly the same.
Best duffy

 

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J!m

·Jan 26, 2024

Not an expert, but from what I know if they both have their correct movement rings, they should both fit into the case properly.

Stem height may be different, but I've not heard any comments either way on that.

 

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Risto

·Jan 26, 2024

I remember that @Archer once told me the cases have different Omega internal product code.

 

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Eve

·Jan 27, 2024

I would expect the cases to be the same but different movement ring. So if the movement comes with correct ring you probably can swap. But that is just an uneducated guess.

 

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Archer

·Jan 27, 2024·Omega Qualified Watchmaker

duffy7

As far as I know the case of the 145.006 (cal 321) and the 145.016 (cal 861) is completly the same.
Best duffy

They are not the same. They use different crystals, different enlargement rings (case rings), different pushers, different case tube, different case clamps...

 

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duffy7

·Jan 27, 2024

Thanks @Archer for jumping in and correcting me - learned again something new today 👍

 

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Caselock

·Jan 27, 2024

Archer

They are not the same. They use different crystals, different enlargement rings (case rings), different pushers, different case tube, different case clamps...

Thanks! Great place to get this detailed info, it's a great forum!