💎The 1989 Upper Deck "R" variation refers to a
rare, early print run where the trademark symbol TM next to the team logo on
the front of cards 1–100 (including the Ken Griffey Jr. #1 rookie) was replaced
by a registered symbol CIRCLED R. These “R” variations are considered scarcer,
representing only about 10% of the early print run, and are highly sought after
by collectors.