This pic is funny beacause, see the Omega logos. Tehy seem to be inverted. The thinner one should be the elder the bold one the latter.
Hm.. I doubt that this is the original crown. See the space around the crown. This said. I may be wrong.
yes there are the screw down and the najad, but in these two versions there are also differents logos on the recente ones, the two are still available in service parts.
On my pic : above, recent screw down with large rounded logo. the other is flat non screw down with quite narrow logo.
PS ;: I didn't mean to be aggressive
No aggression sensed!😀
I like a qualified discussion.
As for my crown it is what it is. And ss pointed out it was found in a condition that indicates that not much had been ever done to it.
The CB case back had got one service inscription/tag, so possibly it is an early service replacement.
From the state of the gaskets and other telltale clues, no one had opened it in ages prior to my watchmaker.
No worry, your sm is splendid. And we are quite sick indeed! Your bezel look like a 70/71 you should have a 164.024 CB case.
nice! There's often a difference between the year of production and the year of selling. 1968 movement.