mbp
·That's good to know, thanks for sharing that information.
In the aeronautic world, "certification" means that your work is validated by an independent authority according specifications you don't write yourself.
"Qualification" is an internal validation, according specifications you define yourself (or internally, like your Quality Control Department for example).
(Sorry if I didn't understand correctly your question... )
Exact. Good question.... Of course vacuum performance is very low for watches with liquid cristal and battery because they usually leak.... So the spec for the x33 must be very different from the moonwatch. Let's find out that test specifications, it will be interesting to compare....😁
I have some pictures of this style case back but can't share them. Both American and ESA astronauts have this case back on their Skywalkers but in the middle it's engraved with the NASA or EAS logo with their name and missions added. Same engraving around the edge just like yours. This engraved case back is usually added to the watch post mission to personalize the watch.