Seiko Prospex Speedtimer Black Dial Leather Strap watch for men SPB517J

The SPB517 is part of Seiko’s “Prospex Speedtimer” line, which draws on Seiko’s long motorsport and rally-timing heritage. The Speedtimer series originally began in 1969, at the same time as the “Datsun 240Z,” and SPB517 celebrates that history. This particular watch is a limited edition (only 2,500 pieces worldwide), commemorating the vintage Datsun rally-car era — the design (colors, typography, logos) references the instrument-panel styling of the 240Z. The idea is to merge classic motorsport-inspired design with modern mechanical watchmaking — giving you a timepiece that’s both a tribute to automotive history and a practical, everyday mechanical watch.