@Tatu - Nice Seiko Diver. I have the same (or similar) 150m model, I bought in 1994. It was my first automatic and got me hooked on them. It's built like a tank and was my everyday work watch for years.
Thanks, this is a pre skx007 aka 6309-7290 (1988). Quite rare to have all original parts on it. Like you said, built like a tank.