My other one. 1001 caliber which the same as the 1000 (1st Buren microrotor movement) but with date display :

 

me likey the slender microtor

 

New Adittion.

 

Ah nice micro rotor. I had forgotten that Buren also used these.

 

Büren invented the micro rotor

 

Oh I was not aware of that, brilliant piece of engineering!

 

Sorry to resurrect such an old thread, but given the topic name is pretty much the same...does the Grand Prix below seem right to you guys? The dial seems very similar to the one shown in @Screwbacks pic from a while back. I'm considering this one as a nice historical vintage piece for the collection if I can snag it for less than 100 USD; does anyone think I should be willing to go higher?

 

i may be bias, but no doubt that would be steal for such a nice gp buren. would not think twice. love the picture of the caliber you've got there with three bridges. good luck.

 

Missed the last ten minutes of the auction and lost by two bucks. Just not my day I guess!

 

It had a chrome-topped case. Steel is far more desirable, and it would be worth paying extra for a full steel case.

In other words, I would argue that your were lucky.

 

I'm taking up this old thread again , but I really need to know if anyone can tell me how old this Büren Grand Prix could be. 40' or early 50'?
Bought it on an auction and are really happy with it

 

My new Buren Rival.
Date of manufacture?

 

I found out mine's from 1945. This site helped me a lot: http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Buren_463

 

Calibre 463

 

With new glass and strap, looks like new

 

Looks really good!