blue double-oval handstamp on 1861 cover front only to Del Air, Michigan, 1861 3c Rose (65, faults) tied by blue grid with matching "Chicago Ills Nov 13" datestamp, additional "Due 2 cts" handstamp, edges a bit ragged, very fine strike, the unique example of this handstamp and the earliest recorded ship letter marking from Chicago, illustrated in Piszkiewicz (page 355)