0 - Year
0 - Month
3 - Month
3 - Production #
We need to narrow it down to what decade that model was produced, the "0" in the serial number means the first year. My guess would be 1990, although it might be as early as 1980. Hard to say without knowing what years it was produced, but I see similar models with that movement from the mid-late 80's through the 90's. The next "03" is the third month, March.
It's most likely 1990 as some have also stated. It looks good. But we do need a shot of the movement as well.
I'd like to make one correction. As with Seiko, the first number is the year, and the second one (just the second one) is the month. Iirc 1 to 9 is january to september, 0 is october n november and d december. So it's 1990 october.