Citizen developed a fantastic-looking, bluetooth-connected mechanical watch called the Proximity using its Eco-drive solar tech:

https://www.citizenwatch.com/us/en/product/BZ1005-51E.html

https://www.citizenwatch.com/us/en/product/BZ1000-54E.html

In theory, its capabilities included phone search/filter and visual/vibration alerts. Not quite a smartwatch, but at least some connection to the digital ecosystem.

I was excited when I heard about this, particularly the Eco-drive, as it meant no charging would ever be necessary. I have one non-Bluetooth Eco-drive which has been running continuously for 12 years without changing the battery.

In practice, the Proximity was a disaster. Owners reported dropped connections, late notifications, and a terrible iOS and Android app. The first two problems, from what I read, related to insufficient power. It wasn't enough to maintain a Bluetooth connection. The third issue is common to many companies that do not have mobile app engineering in their wheelhouse.

Citizen discontinued the models. They have a real smartwatch now (https://www.citizenwatch.com/us/en/product/MX0008-56X.html) but it is not Eco-drive.

I lost mine unfortunately and got a "normal" smartwatch with a touchscreen and all. I don't use 90% of the features and it doesn't look nearly as class as the Steel one.

Dang that is an attractive watch, how open is the communication protocol and how much does it report to home? I'm not a watch-wearer but it could make for a nice gift, especially with such a reasonable price.

I don't think it's open. Looking on the web page it reports all fitness data, but not notifications, but one can't be sure without checking the actual communication.

Well, that made me want one! These look pretty impressive.