The picture below shows a larger view of this Old Unopened Larry Bird Boston Celtics Basketball KeyChain Viewer. The packaging is not dated but it is believed to be from the 1980s. It has an image inside of Larry Bird dribbling a basketball. This is an NBA licensed product. The viewer was from Visual Impact, Inc. of Attleboro Falls, Massachusetts. On the back it is marked:
LARRY BIRD #20233 SERIES 1
To judge the size the backing card measures 2-15/16'' x 5-13/16''. It is in mint unopened condition as pictured.