looks like a type 13 not sure on the year tho http://samplecoinslabs.com/ANACS Photo Certs Type 1 thru 10 article with TD quotes1.pdf
well it seem anacs started makeing plastic slabs in 1989 but when amos baught anacs in 1990 the cert numbers didnt use letters so this has to be sometime after 1990
and now i have narrowed it down even more by counting the barcode letter which equals 19 so some time after 2000 "The 17 character barcode was added two generations later (ANACS 13) around 1991 - 92. there were other changes over the years and the barcode was extended to 19 characters in April 2000. (ANACS 15)"
Your welcome i lile reaserching stuff for people thst i dont know any thing about. I dont remember if your slab was in the document yours is a type 15