Image from personal collection.
A series of character pins were released in Japan commemorating the 20th anniversary of Disney on Ice. There were twenty pins in total, each stamped with a different year. They were sold in five sets of four: 1986-1989 / 1990-1993 / 1994-1997 / 1998-2001 / 2002-2005.
Oddly, some of the pins appeared twice in the series, their only distinction from one another being a different year stamp. The Snow White and Prince pin was one of these duplicates. One was marked "1988" and the other "1996." Backside of pins reads "Disney On Ice, © Disney, Made in China."
Snow White also appeared in this series on a third pin, this one featuring five of the princesses. It was marked with the year "2004."