Dr No[Moderator Omega - Wristscan]
37657
Thanks very much for sharing your DDR with us, Fred. Thomas' [tdn-dk] thread is some nine years old - could you possibly . . .
. . . start a new one? If you need assistance, please send me a pm.
Here are images of Steve G's DDR . . .

. . . acquired at Omegamania fourteen years ago. I'm not a pocket-watch guy, but would jump at the chance of adding one like this to my wristwatch collection.
Art
ref. identifying
By: DeGeus : November 3rd, 2012-14:23
Hallo Thom. This is the very movement which made Omega famous; when it was introduced (size 19''') it was actually called caliber "Omega" (the wellknown story about the namegiving by banker Rieckel). It proved to be a big succes and within a couple of yea...
DDR version
By: DeGeus : November 4th, 2012-03:14
The finest of the series, grade D , with 16 or 17 jewels was available as chronomètre from size 13''' up to 20''' with a 'bulletin' issued by the Bureau / Observatory in Bienne, Neuchatel or Genève - adjusted to variations of less than a minute per month,...
some photos of a DDR
By: fred5 : March 22nd, 2021-14:22
This is actually my grandfather's watch, given to him for Christmas 1911. Serial number 2,584,723 made in 1905. I always thought it was an incredibly beautiful watch even as a young boy but the more I read about it the more I realize how special it is. ...
swift wheel..
By: DeGeus : November 4th, 2012-12:32
Thanks, and that would not be half bad Art ! For a prof. timekeeper or for any time-keeping purposes you would however expect a little more than a bog-standard bread&butter movement, isn't it? The engraving shows a winged wheel with spokes, some kind ...
Thanks..
By: tdn.dk : November 4th, 2012-01:56
I learn a lot here! I guess the conclusion is, it is a 18''' variation of the cal. 19''' properly a standard grade B. According to Omega a 18''' is 40,7 mm, and the cal. 40,6 was actually only 40,0 mm i case diameter (and was first made in 1923). Accordin...