Answer revealed

Dec 08, 2018,15:57 PM
 

The thing that ties these three watches together is their DNA.
They all share Lemania DNA, to be exact, Lemania 1340.
The movement in the Omega Seamaster is Omega cal. 1040, it can be considered an almost identical twin of the Lemania 1340.
The relationship with the UN watches is a little bit more trickier. In the early nineties UN was looking for a strong base caliber to drive the perpetual calendar UN was developing. At this time Ebel was also looking for a replacement caliber ( the El Primero movement they were using was not available anymore) for their automatic chronographs. Ebel and UN joined forces and purchased the rights to the Lemania 1340 and developed two new base caliber to suffice their needs. The result was the UN 32/33 caliber that is found in the UN perpetual calendar and the Ebel 137. In around 2010 Ebel stopped making chronographs and sold the rights of their Cal 137 to UN. UN used this chronograph movement as a basis for their Cal 15x. The UN Marine Regatta has UN cal. 155. So all these beauties share a common ancestor. Fascinating, isn't it?
Denes

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The Quiz of three blue watches

 
 By: Denes_Papp : December 2nd, 2018-13:20
These are my three blue watches. They are all blue, all big and bulky, all very unique, all marine or diver, all distinctive, all special in their own right and they all share something special with each other. Can you guess? Denes ...  

No, I can't guess but . . .

 
 By: M4 : December 2nd, 2018-13:39
. . . I do love the UN Regatta. It's seldom seen around here (or anywhere). M4

Nice, but...

 
 By: Denes_Papp : December 3rd, 2018-05:45
It is very nice indeed, though has to go back for repair already. Out of the box the chrono zeroing function is faulty.

Same date and time. [nt]

 
 By: Thomas_3 : December 2nd, 2018-14:46

Purely accidental:)

 
 By: Denes_Papp : December 3rd, 2018-05:45
Really

Lovely trio!

 
 By: nomadgiles : December 2nd, 2018-13:55
This 1974 blue dial high beat UN says ’Hi’. Look forward to hearing from you more Denes. Best. Nomad. ...  

Warm welcom here 🤗

 
 By: Watchonthewrists : December 2nd, 2018-23:11
Lumen hands 🤔?

Thank you for the welcome

 
 By: Denes_Papp : December 3rd, 2018-05:40
Thank you all for the warm greetings. I have been registered to this forum for several years now, so that is why I seem to be a newbie.

Hint

 
 By: Denes_Papp : December 3rd, 2018-05:41
Think deeper. The answer I am looking for is deeper than the casing.

Answer revealed

 
 By: Denes_Papp : December 8th, 2018-15:57
The thing that ties these three watches together is their DNA. They all share Lemania DNA, to be exact, Lemania 1340. The movement in the Omega Seamaster is Omega cal. 1040, it can be considered an almost identical twin of the Lemania 1340. The relationsh... 

The Regatta uses a UN-155 movement.

 
 By: russell996 : December 9th, 2018-01:47
This is a development of the UN-153 movement which is a completely in-house movement - I don’t believe there is anything to do with a Lemania ebauche being used in the Regatta?

To clarify

 
 By: Denes_Papp : December 8th, 2018-20:33
I remember Marcus wrote an excellent write up regarding the Lemania-UN-Ebel relationship. He was adamant to make the case that the Lemania was ONLY the starting point and the end result UN 32/33 is in its own right an inhouse ebauche.

Departure

 
 By: Denes_Papp : January 14th, 2019-03:08
Sorry to report, but the UN Regatta had to go back. The chronograph function just was not cutting it. Inconsistent starts with jumping to 3-4 seconds and the same problem when when reversing from a "count down". Aside from these technical issues, the watc...