clear strike of circular datestamp ties 1851 3c Dull red (11) to cover to Detroit, blue cornercard for "James H. Rees, Land Agent, No. 63 Clarke St.", extremely fine, an immaculate Independence Day cover which represents the latest known use of the A-3 device, this postmark was in use for almost 11 years and is the longest-lived postmark in Chicago history, illustrated in Piszkiewicz (page 9)