1851 (Jun. 23) Louisville Ky. to New Orleans La., folded letter datelined "Louisville June 23. 1851" and endorsed per steamboat "Belle Key", entered mails with perfect bold strikes of red "New Orleans La. Jul 1" cds and matching "Way 6" rating handstamp on the first day of the new rates, Extremely Fine. Estimate  $400 - 600. AN EXCEPTIONAL USE ON THE FIRST DAY OF NEW RATES AT THE UNPAID 5¢ DOMESTIC RATE PLUS 1¢ WAY FEE. $0 (Image)