Lot
517 
Peru, 1857, Pacific Steam Navigation Co., 1r blue on blue, block of four, large even margins, rich color; stamps with flaws, o.g., Very Fine appearing. Scott Nos. 1 $6,800 as singles.
A SCARCE ORIGINAL-GUM BLOCK OF FOUR OF THE 1857 1R BLUE PACIFIC STEAM NAVIGATION COMPANY ISSUE OF PERU.