Just go for the reference you'd fancy the most, because: The Extract Date can mean:
1. Production: the date when just the movement itself came to Stock at Omega (e.g. December 1966)
2. (Possible) Production, real assembly Date (somewhen the following months, in this case most likely in 1967 already)
3. ..hence, the real delivery date of the Watch to its destination can be in between these two, you can only guess.
So..it's even tougher than you think, a "66" in the caseback might be the best solution
Click to expand...