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 Post subject: Navitimer question
PostPosted: Mon Sep 07, 2020 9:35 pm 
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Is there any difference in the Navitimers that have the chronograph dials in the 3,6,9 positions vs the ones in the 6,9,12? Or is that all?


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 Post subject: Re: Navitimer question
PostPosted: Tue Sep 08, 2020 1:45 am 
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Broadly speaking, the biggest difference is that in the current lineup the 6, 9, 12 layout denotes an ETA-based movement (usually the 7750), whereas 3, 6, 9 (tricompax) tends to be the preserve of the in-house movement. This doesn't hold true for older models as even tricompax models were all ETA-based, just with a chronograph module on top.

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 Post subject: Re: Navitimer question
PostPosted: Tue Sep 08, 2020 2:06 am 
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Just to add to @Driver8, the Valjoux-compax calibre (12, 6 & 9) based watches tend to be slightly smaller at 41.5mm, whereas the Compax calibre (3, 6 & 9) are anything from 41.8mm to 43mm depending on the reference. Thickness, on the other hand, varies based on the reference rather than what dial layout it has.


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 Post subject: Re: Navitimer question
PostPosted: Tue Sep 08, 2020 5:34 am 
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Just to chime in after previous postings - different calibers have different power reserve (in house caliber B01 having the longest one comparing to ETA/Valjoux).

Speaking of some older models (if you are buying used), some of the 3-6-9 models with older B23 caliber (based on ETA 7753) don't have quickset date.


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 Post subject: Re: Navitimer question
PostPosted: Fri Sep 11, 2020 7:22 pm 
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If OP wants to go down the rabbit hole...

https://www.breitlingsource.com/models/navitimer.html

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