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Part description on:
Sales:
Panel 1 x 4 x 1 with Mail Envelope and '7731' on Right Side Pattern (Sticker) - Set 7731
Bricklink ID:30413pb007R
Weight:1.050 g
30413pb007R

Sets with this part (from Bricklink)
  Part color Yellow
 


 Set nameRelease yearQuantity
77317731 Mail Van20081