Tile Round 1 x 1 with R2-D2 Head print

Reference

98138pr0303

BrickLink® #

98138pb306

Tile Round 1 x 1 with R2-D2 Head print (part 98138pr0303) is a LEGO element. CollectORbuild's catalog records it in 1 set, including Death Star Trench Run Diorama.