In my professional opinion, the following item is:

#288 Five Cent Trans-Mississippi. Top Plate Block of 4.   

I grade this item: Medium Fine 3, which means:

Well-Centered. Fresh with excellent color.  All stamps with moderate gum disturbances.  Light foxing spots at upper left.  Scarce.

Scott Catalog Value for OG: $800

Thank you,

Karl Anderson

Anderson Stamp & Coin

POB 51258, Provo, Utah 84605

APS #130744.  I am a full-time stamp and coin dealer; and a regular advertiser in Linn's Stamp News and Coin World Publications (since 1975).