Mack. & Detroit R.P.O. Jul 29 1910, duplex with "RMS" killer ties 10¢ green (E7) and 2¢ Washington, latter uncancelled, on Marathon House corner card cover from Columbiaville Mich. to Saginaw Mich., purple "Delivery Fee Paid / At Saginaw, Mich." two-line handstamp, Jul. 29th arrival backstamp, F.-V.F. Estimate  $200 - 300. $0 (Image)