Thanks for sharing your watch with us. It’s a beautiful example of GS fixation on tricky dials and blued hands.
Here’s one I have from the same era (all hands lined up)

I can provide you with a link so you see how many different GS models there are.
IF it's a rainy day and you want to “window shop”, go here:
MASTER REFERENCE
SPREADSHEET OF GRAND SEIKOS
This list is only “modern” GS up to the name “Seiko” was removed from the dials - end of 2016.
Again, welcome.
Cazalea (Seiko moderator)