1988-1992 is where this would go. It was produced in late 1988 or early 1989. Star Co, Ad Cards were never released in conjunction with specific sets.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 10/25/2023). I have added a large portion of my inventory to the site, and currently have trading turned off (details are in my profile). I have (finally) unearthed my 2 very large boxes of Star Company minor league sets and they are available (email for details).