It’s related to @HatBeard comment about U-Boat watches, and the whole concept of having exposed bubble in an oil filled watches.
Edit; unless you mean both watches in the photo are not the same, probably!
Ah, I thought you meant on the Sinn UX posted earlier, since you said 'their press photo'
Anyway I think the Sinn isn't supposed to have the air bubble. Super cool watch anyway.
Make sense! You’re probably right the Sinn shouldn’t have a bubble.
@Heldring started
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It’s related to @HatBeard comment about U-Boat watches, and the whole concept of having exposed bubble in an oil filled watches.
Edit; unless you mean both watches in the photo are not the same, probably!