Seiko has broadened its cooperation with LOWERCASE and is now offering a variety of Tuna-styled digitals:
As you can see there are five models, two of them limited editions. They feature the solar digital caliber S802. They are housed in a plastic case, the bezel is aluminum.
Measurements as per website are: Vertical 49.89 mm × Width 49.52 mm × Thickness 14.14 mm
They have a diving bezel and are indeed 200m water proof. How do you use a diving bezel with a digital watch? Seiko has the answer! They have a minute track that fills up on the outer rim of the dial:
They also feature dual-time and solar charging. A nifty feature is the EL display, which is activated by tapping the crystal.
Here is the website (use the Chrome browser to translate it automatically):
And here are the features: