Seamaster Chrono 145.006 cases

Posts

201

Likes

295

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

 

Posts

358

Likes

1,231

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

 

Posts

208

Likes

360

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.

 

Posts

1,608

Likes

4,986

Risto

·Jan 26, 2024

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

 

Posts

1,582

Likes

5,086

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.

 

Posts

27,816

Likes

70,651

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...

 

Posts

358

Likes

1,231

duffy7

·Jan 27, 2024

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

 

Posts

201

Likes

295

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!