GMT9 has posted an article on the Seiko Brightz SAGJ003. This watch model features the 7J21 quartz movement. There's also details on some of the other models in this series. It's a good look at the details that set these watches apart. These were discontinued back in 2004, so you won't see to many of these available now.

Link

Seiko HEQ Brightz SAGJ003 Chronograph