Show a photo of your rarest mechanical watch

So, yours is a Slava, made after 1992 with a 6'o'clock day date complication. I have no way to know how rare that might be, but it is "new" by my standards.  Older watches should be rarer because eventually they are all headed for the landfill.

I will define "rare" as having the fewest possible examples extant.  If I wanted to buy a duplicate of one of my watches which would be be the hardest to find?

This, I suppose:

Benrus made and imported a lot of watches.  I have yet to come across another like it.

A fairly common movement (Valjoux 72) in a not so common dial configuration - minute track divided by 100 rather than the usual 60.

Love the Benrus.  Here's mine - not so rare but beautifully resolved:

Does it have to be a wristwatch?  If so, and seeing as how I have only 4 wristwatches, two of which were/are mass produced by major Japanese brands, my Westclox (will this guy ever shut up about Westclox?) 38402 from 1965/66 is it - I haven't seen this dial anywhere but the one I have, and they were likely not a big seller from a brand that probably didn't sell many watches, because they're not a great brand in the first place. This dial design lasted just 2 years in their lineup before they changed it.

But if we can extend that to any watch in our possession, I submit my 1915 Hampden pocket watch.  It's probably not that rare, as Hampden was a fairly popular brand, but I haven't found one just like it (though I haven't really looked recently).

If I can follow @Cheapskate and show a pocket watch this is reasonably rare. 

Otherwise none of my watches are rare mechanical or otherwise. 

I don’t think many of mine are common, probably due to age and survival rate. I do know that for the VC cal.k1002 they only made 24 a year during the production run.

otherwise the Bubble is 1 of 666, the Leonidas and Oris are last of dying breeds, this Enicar is apparently rare, I seem to have a one-off Rado, and I have a couple of custom watches so they are pretty unique.

I see that rare Enicar on eBay twice a month.

don’t ruin my fun 😂

Isn't that the model that was part of NASA testing?

1 of 12, the Christiaan van der Klaauw planetarium, Eise Eisenga edition

Yes, according to legend it was part of the famous test, although no-one seems to really know for sure.  

It certainly looks the part.  The dial is so complicated you almost need to be a rocket scientist to read it.  😉  And timing your rocket burn to the nearest 1/100th of a minute seems to make some mathematical sense.

Nice one young fella 👍

Don't know much about the brand or this particular model, but I picked this one off eBay for a dollar. Love the red tip on the seconds hand 👍 and it runs reasonably well after I had it serviced.

A dollar?? You're speaking directly to my heart. At that price, it doesn't matter what it is, that's a steal.

Entry level Benrus, always pretty.

Wow! You don't see that every day. Stunning.

Most of my watches are relatively current, and commonplace. My "rarest" would probably be my Benrus WristAlarm, but I suspect that it's probably not difficult to find.

I think this little VC was made around 1919. I wish I knew more.

Vintage Heuer 13-1. It's got a Valjoux 7765 which I've never seen before.

Now THAT is a cool piece.

Here's the movement.