Tissot T-Sport Seastar Powermatic 80 T120.407.37.051.00 T1204073705100 Automatic 300M Men's WatchTissot T Sport Seastar Powermatic 80 T120. 407. 37. 051. 00 T1204073705100 Automatic 300M Men's Watch In the pantheon of dive watches, only a few really, really stand out of which, the Seastar appears to be one of the most interesting catches. It is a fully black watch with bold hands and a more stodgy case style, resulting in a chunkier diver thats massive, resembling a steel sandwich that will possibly survive and outlive an apocalypse.