It looks like a full dot matrix screen but it's not
Yeah, when I was digging around trying to find watches with a proper dot matrix screen, there were a lot of pretenders... The giveaway is the seven-segment shape of the numbers instead of something nicer.
This is what they look like when they're working. They have indiglo-type electroluminescent illumination.
It looks like a full dot matrix screen but it's not - the segments are just designed to look like they're made of multiple dots.