New Speedy 1861 pusher stuck

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Hi OFers, long time lurker here, wanted to share my experience of a long awaited Speedy.

After several years of looking/planning/researching (with much inspiration from OF), and a good year at work, I treated myself to a new hesalite Moonwatch in December. Decided that I preferred the 1861 based on the dial design, bracelet and price and managed to find one of the last new ones in the UK. I’ve worn it pretty much daily since then and have loved wearing it, winding it and using the chrono at any opportunity. The dial design is a thing of beauty and it has the feel of a reliable, purpose build timing instrument, obviously backed up by the NASA story. I was super impressed at its accuracy with about +2 seconds a day well exceeding my expectations. All in all I was very pleased with what was a big investment.

Last Thursday I used the chrono to time my lunch and then went to use it again in the evening. I was therefore very surprised to find the top pusher had stuck and wouldn’t start chrono, the time still worked and the reset pusher still felt OK. Nothing unusual had happened to the watch, no drops, excessive moisture etc and I have no idea what could have caused this. I dropped it off at the Regent St OB on Sunday and a friendly chap there explained it would be about 5 weeks for their watchmaker (or the Omega service centre) to look at it under warranty. This is what I expected and confirmed the great benefit of the OB service with Omega.

I understand it’s a mass produced thing and manufacturing defects can happen (one reason for not getting the 3861 was to avoid the chrono problems documented here) but I’m quite disappointed this has happened - it’s somewhat tarnished my experience of this watch I know so many of you love.

Has anyone has seen anything similar (Archer maybe?) or have I just been very unlucky? Any other words of advice? It’ll be back on my wrist soon and really at the end of the day is a only minor inconvenience in the grand scale of things. Truly a first world problem.

As expected here’s some pics and finally thanks to OF for this wonderful source of knowledge.

 
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I've had many Speedmasters over the years and have never had a stuck pusher, just bad luck in this case. The watch repairers will chime in as to what may be the issue here.
 
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Last Thursday I used the chrono to time my lunch and then went to use it again in the evening. I was therefore very surprised to find the top pusher had stuck and wouldn’t start chrono, the time still worked and the reset pusher still felt OK.

What do you mean by "stuck"? Is it not able to be depressed? Is it able to be depressed by stays depressed even when you let go?

If it's the former, then I suspect a loose screw has made it's way into the area near the pusher and is jamming it - I've seen this a few times.

If it's the latter, then possibly a broken spring inside the pusher...
 
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Thanks both 👍

@Archer, it’s the former. Stop start pusher won’t engage as if something is blocking in in the movement. I saw the thread with the picture of the screw in the transparent case back and wondered if it could be that.

Thanks again, will report back when I hear from the OB.