zOwie Omega Discussion Forum

: Is movement 1120 the only movement that omega
: has put into the SMP 2531.80? Were there any
: updates besides the co-axial movement and
: when did they stop making this style?

This is a good question. The "Bond" style Seamasters debuted in 1993, and at that time caliber 1120 did not exist. It wasn't put into watches until 1996. It's predecessor, caliber 1109, had a minor problem associated with it, as described here (courtesy of this website and its founder, Derek Ziglar):

Earlier versions of the Seamaster Pro used the OMEGA 1109 automatic movement. This movement was also used in a number of other OMEGA models, including the Seamaster 120, Constellation, and De Ville. A small portion of these watches may have trouble with a winding gear that prevents the watch from reaching its stated 44 hour power reserve. Around 1996, OMEGA revised the movement slightly to fix this potential winding problem and to add rhodium finishing on some parts for extra durability. The revised version is called the OMEGA 1120.

There is no cause for alarm simply because your watch has the 1109 movement. Most of them are perfectly fine. If you are experiencing winding problems on a 1109-based OMEGA watch, an OMEGA service center may be able to resolve the issue.

I have never seen a Bond model 2531.80 with caliber 1109 in it, and I can't recall anyone ever posting about one on the forums. If anyone does have such a model, I'd love to know about it (to confirm that they really exist).

From 1996-2007, Omega didn't make any changes to the model 2531.80, with the exception of the small logo on the caseback (shown below). This was introduced around the beginning of 2004 as an "anti-counterfeit" tool. The 2531.80 was discontinued at the beginning of this year, even though the new co-axial model was released in the fall of 2006. It's now extremely difficult to find a new model 2531.80 still sitting on a dealer's shelf.

-John