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Should the Omega and helium crown both align horizontally or is it random?

Goseki
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New here, so sorry if the answer is obvious, but I couldn't find an answer with the forum search. Just got my NTTD seamaster and was wondering if the omega and the HE crown is supposed to align horizontally with the watch case once screwed down.

20250203_221839.webp 20250203_221855.webp
 
JimInOz
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No. Positions will be random, depending on finger torque, case tube/crown wear and manufacturing tolerances.
 
hen
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Thats a thing I have never given a taught, mine are random too, but with my eyes (and the angle) I dont see them at all.
 
p4ul
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hen hen
Thats a thing I have never given a taught, mine are random too, but with my eyes (and the angle) I dont see them at all.
Me too, or the date!
 
YY77
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Check this postwhy it can't be 100% horizontal:

https://omegaforums.net/posts/1967087/ Archer
Archer ·
TDBK TDBK
Just as an example, if we take M1 fine thread as a example, it has 0.2mm pitch; so getting 1° accuracy in slot angle would require 0.5 µm positioning of the thread, which is Very Precise. I'm not sure if a CNC lathe could accomplish it with positive control of spindle angle and single-point threading, but it would be expensive. (Relevant YouTube video, where this operation uses a threading tool, not single-point:
)

Indeed, and you would have to position the start of the thread in the case just as closely.

If we are talking about a screw down crown, you have a...
 
Goseki
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YY77 YY77
Check this postwhy it can't be 100% horizontal:

https://omegaforums.net/posts/1967087/ Archer
Archer ·
TDBK TDBK
Just as an example, if we take M1 fine thread as a example, it has 0.2mm pitch; so getting 1° accuracy in slot angle would require 0.5 µm positioning of the thread, which is Very Precise. I'm not sure if a CNC lathe could accomplish it with positive control of spindle angle and single-point threading, but it would be expensive. (Relevant YouTube video, where this operation uses a threading tool, not single-point:
)

Indeed, and you would have to position the start of the thread in the case just as closely.

If we are talking about a screw down crown, you have a...
That makes perfect sense. I had never thought about it much before since my previous seikos had the S aligned perfectly, but I guess it is a luck of the draw.
 
scapa
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Goseki Goseki
That makes perfect sense. I had never thought about it much before since my previous seikos had the S aligned perfectly, but I guess it is a luck of the draw.
In my experience of (too many) Seikos, getting any sort of alignment of any aspect of the watch, from chapter ring to bezel to movement, below a Marinemaster is little short of miraculous. I love 'em, but it's very much an "adjust expectations" arrangement.

Can always cheat by screwing/ unscrewing to the point at which each lines up, I guess.

Anecdotally, my 300 Heritage lines up, for now, whilst my SMP 300 white dial doesn't. So it goes. Upthread vid a very helpful explainer.
 
Dan S
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Terrible. I think this requires a repair under warranty. Yet another QC issue for this entry-level watch. 🙄
 
hen
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Dan S Dan S
Terrible. I think this requires a repair under warranty. Yet another QC issue for this entry-level watch. 🙄
Hush, Kevin!
 
hen
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scapa scapa
Can always cheat by screwing/ unscrewing to the point at which each lines up, I guess.
I tried that, and now my crown is stuck forever and the He valve broke. Wasn`t pliers and a wise the right tools?
 
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