The Watch Co. on Instagram: “Seiko - S229-5000 Pulsemeter (Alien Watch) 1980-1989. . As early as 1983, Seiko had come out with their first watch equipped with a new…”
Seiko Pulsemeter S229-5001 - Coolest Vintage
Vintage Seiko Pulse meter S229-5001 alarm/ chronograph | WatchCharts
TBT Two Seiko Pulsemeter Digital Chronographs
FS - Seiko Pulsemeter S229-5019 $69 SOLD | The Watch Site