I would not expect it to align. Would be quite hard for a screw down back and to maintain proper water resistance. Same for the crown. The watchmaker tightens the back with the correct torque to get the proper WR and not to align the back images.

 

Dunno, my Amphibia's are all perfectly alligned, despite all of them have screw-down backs
Now joke aside, I don't have Heritage 300, but I didn't found anywhere the information that it uses Naiad lock. I don't also see the Naiad logo on the lug, and I assume that every watch with this lock should have it at least as a reference for the watchmakers how to handle the case (I don't mean the text "Naiad Lock", but the small logo on the lug on 4 o'clock):

 

After looking into purchasing the 75th Anniversary "Summer Blue" Seamaster 300 Heritage, I noticed an issue with the alignment of the engraved caseback that doesn't seem to be the case on any of the other 75th anniversary models. Bear with me, it took a lot of googling to convince myself that there's an issue, so I thought I'd compile my findings here.

All of the other models appear to be using Omega's 'Naiad lock' tech, which guarantees that the caseback will line up perfectly each time. While 'Naiad lock' it's not written anywhere on the caseback like it is with other models (such as the Railmaster, NTTD Seamaster), The WatchAdvisor commentary mentions it does use it, and I think it's evident based on all the footage and pictures I've seen so far. You can tell by the Omega logo lining up with 12 o'clock on each model. Here's some examples taken from the WatchAdvisor video:

Aqua Terra (Aligned)
View attachment 18015947

Aqua Terra World Time (Aligned)
View attachment 18015948

SMP (Algined)
View attachment 18015952

Planet Ocean (Aligned)
View attachment 18015953

Ultra-deep (aligned)
View attachment 18015954

However, this is not the case with the Seamaster 300 Heritage model caseback, which is consistently mis-aligned by about 30 degrees clockwise on every video, forum, and Chrono24 listing I've seen. If this model couldn't support the Naiad lock for whatever reason, that's understandable and it'd just be luck of the draw in regards to how it lines up. But given that every example I've seen is off by the exact same amount, I think that it is using Naiad lock, but for some reason it's not being deployed correctly on this model.

Here are some examples of Seamaster 300 misalignment:
WatchAdvisor video:
View attachment 18015949

Photos from various listings:
View attachment 18015960

View attachment 18015961

View attachment 18015971

Obscured by sticker, but you can tell by the text that it's the same here.
View attachment 18015982


So for any owners of this model (which I should note is a stunner regardless), does your caseback line up perfectly, or does yours have the misalignment that I mentioned above?

I wonder if it could be a QC issue for early models. It's worth noting that the renders from Omega show the caseback lining up perfectly for this model. Is it a fair expectation to have it line up, or am I crazy for obsessing over this detail??

mine has the mis- alignment you describe.

 

My SMP Diver 300m is misaligned similar to the photo’s of the Seamaster 300 posted above.

Anyone know if this can be rectified by simply removing/repositioning/retightening the caseback?

Or, do I have to live with the cards the watch gods have dealt me?

 

Will check with dad next week. We just picked up a summer blue seamaster heritage today. I thought naiad lock is for ceramic and Ti case, not steel but I could be wrong. Do we know for sure it has Naiad Lock? Otherwise the description "misalignment" is a bit extreme and inaccurate.

 

@Summydad1 how well does your caseback align? Does it have Naiad Lock? Not something I would even consider if it wasn't for this thread.

 

Mine is off too but not so bad. I don’t see any notation of the lock.

 

Pretty sure none of the 75th Anniversary models feature Naiad - I know my SMP Diver 300m definitely doesn’t. Which I find odd given the commemorative casebacks.