(scans are of a Platinum parallel)
Set Type: Insert
Card dimensions: 2½” x 3½”
Parallels: Gold, serial numbered to 20; Masterpiece, serial numbered “1/1”; Platinum, serial numbered to 5
Additional Information: Seeded in packs of 2012 Topps Museum Collection. Base cards are serial numbered to 30. All base and parallel version bear the serial number on the front of the card. Although “Momentous Materials” does not appear on the card, the numbering system used on the back of the card suggests at point during the production process Topps considered including the words as part of the name of the series.