I got this watch by accident. I was buying a "regular" handwind Zenith but it revealed a surprise. I got lucky, because of the super tight caseback. This was definitely the tightest caseback I have ever opened and it has kept other owners away.
However, the movement looks untouched, dial & hands too. I bet this has never been serviced.

I service watches but I think I let this one alone. Whoever gets this, probably values more the collector aspect of this.
I would like to hear your input, what is the rarity of this piece? I have a ballpark figure of the value of this in my head, but I welcome any input

 

Nice condition indeed!
not sure about its rarity but a nice piece for sure ☺

 

According to Rossler they made 18,000 of these movements between 1961 and 1963 so it is not particularly rare. It is interesting that the movement is marked as "Adjusted" but there is no evidence of it being chronometre rated - I know Zenith didn't submit many examples for testing - but it is a three hand Zenith without the cult status of some of their examples.

It is in very good shape though (other than the engraving) and personally, I might go to £500/€700/$750 if I wanted it for my collection (the $ figure is taking into account the VAT I would have to pay) Having said that, I am not in the market for one of these but the only true way of finding its value would be to enter it into an auction - either eBay or a real auction house.

 

Found the version of the 120T interesting, and came over some information after some searching.
The Extra RR models seems to be relative rare within the 120T production. Total production of 120T was, as stated above, reported as 18.000. However the Extra RR marking signifies special adjustments. From a Finish site (Google translated):
"Extra RR (= Railroad) Canadian railways (Canadian Pacific Railway) special edition, which was according to the customer's requirements tested and adjusted in 6 positions".
This, I assume, is fully in line with chronometer specifications of the days, or perhaps even tighter!
You can also find Zenith pocket watches with the same "Extra R.R." markings on the movement.

 

The condition of that movement is incredible [emoji15].

Great buy!

 

As has been said, value is difficult. Because it is marked RR only on the movement, some collectors will not give it any extra attention. I love the piece. Probably the only way to know its value is to auction it off.

JOHNCOTE

 

Are there caliber 120T examples out there with RR markings on the dial/case?

 

Not that I know of. My implication was that there are collectors out there who like RR associated watches. Omega, Ball, Elgin, Bulova just to mention a few made wrist watches which are obvious from the outside. This one is sort of a stealth RR watch.

JohnCote

 

IMO that makes it even cooler.....

 

Thank you for your comments, gentlemen. This is very fascinating as there is so liitle info about this. I will think about the auctioning.

http://forums.watchuseek.com/f27/please-post-your-vintage-zenith-770983-40.html
In this link there is another very same watch.

 

http://forums.timezone.com/index.php?t=tree&goto=5560684&rid=0

Here's older 120t RR to answer one question.

 

I'm getting ready to auction this watch. What would be the best channel to do so? Ebay?

 

If you make a kind request to one of the Mod´s perhaps they will let you list it here on OF?
eBay is also an alternative, but fees and scammers are rampant.