Prospex SPB151

The Seiko Prospex SPB151 is a modern reinterpretation of the iconic 1970s 6105 "Captain Willard" diver. It preserves the distinctive asymmetrical cushion case shape while updating it with modern size, finishing, and the 6R35 automatic movement, offering a 70-hour power reserve. It is valued by collectors as a historically rooted yet highly wearable dive watch.