This is my grail digital watch a Seiko 0634-5019. Worlds first digital chrono, I have other 0634 that you can see on the page but this one is the pinnacle of that range. The 5019 has a different case shape that is more angled and chunky. Also has a more aggressive bracelet to match with the two tone banding makes it really stand out.
I could write for 2000 words on this one but fortunately I blogged about it so please see here to read about all the work that I carried out on this model. 0634-5019 Blog