Is that the original paint?? That looks AWESOME! my Titanium Frost needs some work, I think im going to go to maaco for a cheap respray.. i was gunna go to black or charcoal gray, but your car has convinced me otherwise...
but to anser your question, are they a dark, or light grey? They are definitely 87-9 seats, but 87-890 had charcaol gray, 90-92 had titanium gray, and 93 had like a shade of gray in between, more like charcoal. If the headrest on the seats you have are the same as the one in that listing, then i can definitely say your seats are from 90+. If the headrest is huge, then its definitely 87-89.