Backings for First Day Covers. U.S. Cover #6. 3-5/8 x 6-3/4". .028" thick Acid-Free Board. Long-term Storage. (Sleeve :SFDCUS6PETF)
Details
Backings for First Day Covers - U.S. Cover #6.
3-5/8 x 6-3/4"
.028" thick Acid Free Board.
Board is white on both sides.
Use for long-term storage.
Use with Polyester (mylar) sleeve SFDCUS6PETF
3-5/8 x 6-3/4"
.028" thick Acid Free Board.
Board is white on both sides.
Use for long-term storage.
Use with Polyester (mylar) sleeve SFDCUS6PETF