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Part description on:
Tile, Round 2 x 2 with Bottom Stud Holder with Bright Light Blue S.H.I.E.L.D. Eagle on Dark Bluish Gray Background Pattern (Sticker) - Set 76042
Bricklink ID:14769pb156
Weight:0.330 g

Sets with this part (from Bricklink)
  Part color Dark Bluish Gray

 Set nameRelease yearQuantity
7604276042 The SHIELD Helicarrier20154